content: {
    "$defs": {
      "CompactDate": {
        "description": "Short date that only includes year and month",
        "pattern": "^[0-9]{4}-[0-1][0-9]$",
        "title": "Compact Date",
        "type": "string"
      }
    },
    "$id": "https://github.com/invopop/jsonschema/compact-date",
    "$ref": "#/$defs/CompactDate",
    "$schema": "https://json-schema.org/draft/2020-12/schema"
  }