diff --git a/_extensions/cps.py b/_extensions/cps/__init__.py
similarity index 84%
rename from _extensions/cps.py
rename to _extensions/cps/__init__.py
index cdad821..04e6d28 100644
--- a/_extensions/cps.py
+++ b/_extensions/cps/__init__.py
@@ -1,16 +1,19 @@
 import os
 import re
 from dataclasses import dataclass
-from typing import cast
+from types import NoneType
+from typing import Any, cast
 
 from docutils import nodes
 from docutils.parsers.rst import Directive, directives, roles
 from docutils.transforms import Transform
+from docutils.utils.code_analyzer import Lexer, LexerError
 
-from jsb import JsonSchema
+import jsb
 
 from sphinx import addnodes, domains
 from sphinx.util import logging
+from sphinx.util.docutils import SphinxRole
 from sphinx.util.nodes import clean_astext
 
 logger = logging.getLogger(__name__)
@@ -49,8 +52,11 @@ def apply(self, **kwargs):
                 if self.document.nameids.get(ref['refname']):
                     continue
 
-            # Convert remaining non-external links to intra-document references
             refuri = ref['refuri'] if 'refuri' in ref else None
+            if refuri and refuri.startswith('./'):
+                continue
+
+            # Convert remaining non-external links to intra-document references
             if self.is_internal_link(refuri):
                 # Get the raw text (strip ``s and _)
                 rawtext = re.sub('^`(.*)`_?$', '\\1', ref.rawsource)
@@ -126,6 +132,8 @@ class AttributeDirective(Directive):
         'overload': directives.flag,
         'required': directives.flag,
         'conditionally-required': directives.flag,
+        'format': directives.unchanged,
+        'default': directives.unchanged,
     }
 
     # -------------------------------------------------------------------------
@@ -165,9 +173,8 @@ def parse_type(self, typedesc):
 
             return content
 
-        m = re.match(r'^(list|map)[(](.*)[)]$', typedesc)
-        if m:
-            outer, inner = m.groups()
+        outer, inner = jsb.decompose_typedesc(typedesc)
+        if outer:
             content = [
                 make_code(outer, 'type'),
                 nodes.Text(' of '),
@@ -180,12 +187,33 @@ def parse_type(self, typedesc):
 
             return content + self.parse_type(inner)
 
-        elif typedesc in {'string'}:
+        elif typedesc in jsb.BUILTIN_TYPES:
             return [make_code(typedesc, 'type')]
 
         else:
             return [make_code(typedesc, 'object')]
 
+    # -------------------------------------------------------------------------
+    def parse_data(self, data):
+        language = 'json'
+        classes = ['code', 'highlight', f'highlight-{language}']
+
+        try:
+            tokens = Lexer(nodes.unescape(data, True), language, 'short')
+        except LexerError as error:
+            msg = self.state.inliner.reporter.warning(error)
+            prb = self.state.inliner.problematic(data, data, msg)
+            return [prb]
+
+        node = nodes.literal(data, '', classes=classes)
+        for classes, value in tokens:
+            if classes:
+                node += nodes.inline(value, value, classes=classes)
+            else:
+                node += nodes.Text(value)
+
+        return [node]
+
     # -------------------------------------------------------------------------
     def run(self):
         name = self.arguments[0]
@@ -194,6 +222,8 @@ def run(self):
         overload = 'overload' in self.options
         required = 'required' in self.options
         conditionally_required = 'conditionally-required' in self.options
+        typeformat = self.options.get('format')
+        default = self.options.get('default')
 
         if overload:
             target = f'{name} ({context[0]})'
@@ -233,6 +263,9 @@ def run(self):
         fields += self.make_field(
             'Required', required_text, [nodes.Text(required_text)])
         section += fields
+        if default:
+            fields += self.make_field(
+                'Default', default, self.parse_data(default))
 
         # Parse attribute description
         content = nodes.Element()
@@ -245,18 +278,29 @@ def run(self):
         # Record object on domain
         env = self.state.document.settings.env
         domain = cast(CpsDomain, env.get_domain('cps'))
-        domain.note_attribute(name, context, typedesc, required=required,
-                              description=simplify_text(content), node=section)
+        domain.note_attribute(name, context, typedesc, typeformat,
+                              required=required, default=default,
+                              description=simplify_text(content),
+                              node=section)
 
         # Return generated nodes
         return [section]
 
+# =============================================================================
+class SchemaRole(SphinxRole):
+    def run(self):
+        uri = f'./{self.config.schema_filename}'
+        node = nodes.reference(self.rawtext, self.text, refuri=uri)
+        return [node], []
+
 # =============================================================================
 @dataclass
 class Attribute:
     typedesc: str
+    typeformat: str
     description: str
     required: bool
+    default: Any
 
 # =============================================================================
 class AttributeSet:
@@ -293,7 +337,10 @@ def __init__(self, *args, **kwargs):
         self.directives['object'] = ObjectDirective
         self.directives['attribute'] = AttributeDirective
 
-        # Site-specific custom roles (these just apply styling)
+        # Site-specific roles
+        self.roles['schema'] = SchemaRole()
+
+        # Additional site-specific roles (these just apply styling)
         self.add_role('hidden')
         self.add_role('applies-to')
         self.add_role('separator')
@@ -326,9 +373,9 @@ def note_object(self, name, description):
             self.objects[name] = description
 
     # -------------------------------------------------------------------------
-    def note_attribute(self, name, context, typedesc,
-                       required, description, node):
-        a = Attribute(typedesc, description, required)
+    def note_attribute(self, name, context, typedesc, typeformat,
+                       required, default, description, node):
+        a = Attribute(typedesc, typeformat, description, required, default)
         if name not in self.attributes:
             self.attributes[name] = AttributeSet(name, context, a, node)
         else:
@@ -359,7 +406,7 @@ def write_schema(app, exception):
     title = f'{config.project} v{config.version}'
 
     domain = cast(CpsDomain, app.env.get_domain('cps'))
-    schema = JsonSchema(title, config.schema_id)
+    schema = jsb.JsonSchema(title, config.schema_id)
 
     object_attributes = {}
     for attribute_set in domain.attributes.values():
@@ -367,7 +414,9 @@ def write_schema(app, exception):
             schema.add_attribute(
                 attribute_set.name, i,
                 attribute.typedesc,
+                attribute.typeformat,
                 attribute.description,
+                attribute.default,
             )
 
         for context, attribute_ref in attribute_set.context.items():
@@ -385,7 +434,7 @@ def write_schema(app, exception):
         schema.add_object_type(name, description, object_attributes[name])
 
     output_path = os.path.join(app.outdir, config.schema_filename)
-    schema.write(config.schema_root_object, output_path)
+    schema.write(config.schema_root_object, output_path, config.schema_indent)
 
 # =============================================================================
 def setup(app):
@@ -393,6 +442,7 @@ def setup(app):
     app.add_config_value('schema_id', '', '', [str])
     app.add_config_value('schema_filename', 'schema.json', '', [str])
     app.add_config_value('schema_root_object', None, '', [str])
+    app.add_config_value('schema_indent', None, '', [NoneType, int])
 
     # Add custom transform to resolve cross-file references
     app.add_transform(InternalizeLinks)
diff --git a/_extensions/cps/pygments_styles.py b/_extensions/cps/pygments_styles.py
new file mode 100644
index 0000000..944b559
--- /dev/null
+++ b/_extensions/cps/pygments_styles.py
@@ -0,0 +1,13 @@
+import pygments.token
+
+from sphinx.pygments_styles import SphinxStyle
+
+# =============================================================================
+class CpsDataStyle(SphinxStyle):
+    background_color = ''
+
+    styles = SphinxStyle.styles
+    styles.update({
+        pygments.token.Name.Tag:                '#15a',
+        pygments.token.Literal.String.Double:   '#d32',
+    })
diff --git a/_packages/jsb.py b/_packages/jsb.py
index 91c9f85..4f10b28 100644
--- a/_packages/jsb.py
+++ b/_packages/jsb.py
@@ -1,6 +1,15 @@
 import json
 import re
 
+BUILTIN_TYPES = {
+    'string',
+}
+
+# =============================================================================
+def decompose_typedesc(typedesc):
+    m = re.match(r'^(list|map)[(](.*)[)]$', typedesc)
+    return m.groups() if m else (None, typedesc)
+
 # =============================================================================
 class JsonSchema:
     # -------------------------------------------------------------------------
@@ -33,9 +42,8 @@ def add_type(self, typedesc):
 
             return
 
-        m = re.match(r'^(list|map)[(](.*)[)]$', typedesc)
-        if m:
-            outer, inner = m.groups()
+        outer, inner = decompose_typedesc(typedesc)
+        if outer:
             self.add_type(inner)
 
             if outer == 'list':
@@ -52,7 +60,7 @@ def add_type(self, typedesc):
                     },
                 }
 
-        elif typedesc in {'string'}:
+        elif typedesc in BUILTIN_TYPES:
             # Handle simple (non-compound) types
             self.types[typedesc] = {'type': typedesc}
 
@@ -62,12 +70,21 @@ def add_type(self, typedesc):
             pass
 
     # -------------------------------------------------------------------------
-    def add_attribute(self, name, instance, typedesc, description):
-        self.attributes[f'{name}@{instance}'] = {
+    def add_attribute(self, name, instance, typedesc, typeformat,
+                      description, default=None):
+        attr = {
             'description': description,
             '$ref': f'#/definitions/types/{typedesc}',
         }
 
+        if typeformat:
+            attr['format'] = typeformat
+
+        if default:
+            attr['default'] = json.loads(default)
+
+        self.attributes[f'{name}@{instance}'] = attr
+
         self.add_type(typedesc)
 
     # -------------------------------------------------------------------------
@@ -98,5 +115,9 @@ def _build_schema(self, root_object):
         return schema
 
     # -------------------------------------------------------------------------
-    def write(self, root_object, path):
-        json.dump(self._build_schema(root_object), open(path, 'wt'))
+    def write(self, root_object, path, indent=None):
+        json.dump(
+            self._build_schema(root_object),
+            fp=open(path, 'wt'),
+            indent=indent,
+        )
diff --git a/conf.py b/conf.py
index 09cc38c..2bd46e3 100644
--- a/conf.py
+++ b/conf.py
@@ -1,9 +1,5 @@
 # -*- coding: utf-8 -*-
 
-import os
-import re
-import sys
-
 # -- General configuration ------------------------------------------------
 needs_sphinx = '6.2'
 extensions = ['cps', 'autosectionlabel']
@@ -23,15 +19,16 @@
 
 language = 'en'
 primary_domain = 'cps'
-#default_role = None
+# default_role = None
 
-highlight_language = 'none'
-pygments_style = 'sphinx'
+highlight_language = 'json'
+pygments_style = 'cps.pygments_styles.CpsDataStyle'
 
 # -- Options for JSON schema output ---------------------------------------
 schema_filename = 'cps.schema.json'
 schema_root_object = 'package'
 schema_id = 'https://cps-org.github.io/cps/' + schema_filename
+schema_indent = 2
 
 # -- Options for HTML output ----------------------------------------------
 html_style = 'cps.css'
diff --git a/pyproject.toml b/pyproject.toml
index 4ee70cd..5691964 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ authors = ["The CPS Project <@>"]
 readme = "readme.md"
 packages = [
   { include = "jsb.py", from = "_packages" },
-  { include = "cps.py", from = "_extensions" },
+  { include = "cps", from = "_extensions" },
   { include = "autosectionlabel.py", from = "_extensions" },
 ]
 
diff --git a/sample.rst b/sample.rst
index d6f3ed8..ff6bb0d 100644
--- a/sample.rst
+++ b/sample.rst
@@ -11,4 +11,4 @@ Many of the most commonly used attributes are demonstrated,
 as is the technique discussed in `Configurations as Flags`_.
 
 .. literalinclude:: sample.cps
-  :language: javascript
+  :language: json
diff --git a/schema-supplement.rst b/schema-supplement.rst
index 21dfdc2..eb8a4fb 100644
--- a/schema-supplement.rst
+++ b/schema-supplement.rst
@@ -90,6 +90,7 @@ By definition, none of the following attributes are required.
 .. cps:attribute:: website
   :type: string
   :context: package
+  :format: uri
 
   Specifies the URI at which the package's website may be found.
 
diff --git a/schema.rst b/schema.rst
index 3ff2561..b7d45e2 100644
--- a/schema.rst
+++ b/schema.rst
@@ -385,6 +385,7 @@ Attribute names are case sensitive.
 .. cps:attribute:: link_languages
   :type: list(string)
   :context: component configuration
+  :default: ["c"]
 
   Specifies the ABI language or languages of a static library
   (`type`_ :string:`"archive"`).
@@ -392,7 +393,6 @@ Attribute names are case sensitive.
   :string:`"c"` (no special handling required) and
   :string:`"cpp"` (consuming the static library
   also requires linking against the C++ standard runtime).
-  The default is :string:`"c"`.
 
 .. ----------------------------------------------------------------------------
 .. cps:attribute:: link_libraries
@@ -594,6 +594,7 @@ Attribute names are case sensitive.
 .. cps:attribute:: version_schema
   :type: string
   :context: package
+  :default: "simple"
 
   Specifies the structure
   to which the package's version numbering conforms.
@@ -605,7 +606,6 @@ Attribute names are case sensitive.
   If a package uses :string:`"custom"`,
   version numbers may be compared,
   but version ordering is not possible.
-  The default is :string:`"simple"`.
 
   Needless to say,
   changing a package's version scheme between releases
@@ -659,6 +659,16 @@ Notes
   and using the platform's usual format for such binaries
   (ELF, PE32, etc.).
 
+JSON Schema
+'''''''''''
+
+A `JSON Schema`_ for CPS can be obtained :schema:`here`.
+The schema is generated from this documentation,
+and is intended to be used for machine validation of CPS files.
+In case of discrepancies, this documentation takes precedence.
+(That said, issue reports are welcomed and strongly encouraged;
+please refer to our `Development Process`_.)
+
 .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... ..
 
 .. _Common Language Runtime: https://en.wikipedia.org/wiki/Common_Language_Runtime
@@ -667,6 +677,8 @@ Notes
 
 .. _Java: https://en.wikipedia.org/wiki/Java_%28programming_language%29
 
+.. _JSON Schema: https://json-schema.org/
+
 .. _semver: http://semver.org/
 
 .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... ..