fix(Executable code nodes): Make executeCount unsigned and clarify …

…docs

rust/src/types.rs

@@ -238,7 +238,7 @@ pub struct CodeChunk {
     pub execute_auto: Option<CodeChunkExecuteAuto>,
 
     /// A count of the number of times that the node has been executed.
-    pub execute_count: Option<Integer>,
+    pub execute_count: Option<u32>,
 
     /// The `compileDigest` of the node when it was last executed.
     pub execute_digest: Option<Box<Cord>>,
@@ -304,7 +304,7 @@ pub struct CodeExpression {
     pub errors: Option<Vec<CodeError>>,
 
     /// A count of the number of times that the node has been executed.
-    pub execute_count: Option<Integer>,
+    pub execute_count: Option<u32>,
 
     /// The `compileDigest` of the node when it was last executed.
     pub execute_digest: Option<Box<Cord>>,

schema/CodeExecutable.schema.yaml

@@ -41,8 +41,9 @@ properties:
     type: integer
     minimum: 0
     $comment: |
-      Analogous to `execution_count` in Jupyter Notebook format v4.5 but not a required
-      property as it is there.
+      Intended to increment with each successive execution of the node, including across sessions.
+      Note that this differs to the `execution_count` in Jupyter Notebook format which is
+      the "code cell's prompt number" and which resets at the start of each new session.
   executeDigest:
     '@id': stencila:executeDigest
     description: The `compileDigest` of the node when it was last executed.

ts/bindings/rust.ts

@@ -64,6 +64,8 @@ const propertyTypes: Record<string, string> = {
   'ArrayValidator.maxItems': 'u32',
   'StringValidator.minLength': 'u32',
   'StringValidator.maxLength': 'u32',
+  'CodeChunk.executeCount': 'u32',
+  'CodeExpression.executeCount': 'u32',
   // Use `Cord` instead of string for more efficient patching of digests
   '*.compileDigest': 'Box<Cord>',
   '*.buildDigest': 'Box<Cord>',