Question regarding inheritance of types

[aldrichtr]

First off, let me say that I really appreciate all your work. The TaskNotes plugin is amazing!

I've been following along as the mdbase spec is evolving, and I think the addition of contracts, query language, etc is going to be awesome. My one catch (and I admit it is more of a "personal preference") is the mechanism for inheriting types. In my specific use-case I have the following model I'm trying to implement:

---
title: Note Hierarchy
---
classDiagram
  class Note{
    +String title
    +String id
  }
  class Article{
    +bool draft
  }
  Note <|-- Article

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If I understand inheritance correctly, the only way to do that is by turning Note into a json schema file instead of an md type file. That means I now have two sets of definitions in my collection, types defined in markdown and types defined in json. I really want to keep the collection as "pure markdown + frontmatter" as possible.

Is it possible to do something like:

kind: mdbase.type
name: article
# ...
schema:
  dialect: json-schema-2020-12
  value:
    $schema: "https://json-schema.org/draft/2020-12/schema"
    # -----------------------
    extends: note
    # or maybe --------------
    allOf:
      - $ref: "#defs/note"
    # -----------------------