Allow $extends to accept an array of JSON Pointers for multiple inheritance #20
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
added 2 commits
November 29, 2025 16:52
…itance - Updated $extends value to accept either a single JSON Pointer or an array - Added rule for collision resolution: first-wins (properties from earlier types in the array take precedence) - Added example demonstrating multiple inheritance with BaseHeader and Metadata This enables composition patterns common in other schema languages like CDDL. Fixes #18
clemensv
pushed a commit
to json-structure/meta
that referenced
this pull request
Nov 29, 2025
- Added TypeReferenceArray definition for arrays of type references - Updated $extends in ObjectType, TupleType, and ChoiceType to accept single or array - Related to json-structure/core#20
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR extends the
\$extends\keyword to support multiple inheritance by accepting an array of JSON Pointers.Changes
Updated the
$extendskeyword value to accept either:Added collision resolution rule: When multiple base types define properties with the same name, the property from the first base type in the array takes precedence (first-wins).
Added example demonstrating multiple inheritance with \\BaseHeader\\ and \\Metadata\\ abstract types.
Motivation
This enables composition patterns common in other schema languages like CDDL, where types can be composed from multiple base groups using the unwrap operator (\~\).
Compatibility
This is backward-compatible:
Fixes #18