{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "https://designsystemdocspec.org/v0.15.2/metadata/since.schema.json", "title": "Since metadata field", "description": "The design system version in which this entity was introduced.", "$defs": { "since": { "type": "string", "description": "The design system version in which this entity was introduced (ex:, '1.0.0', '2.3.0').", "minLength": 1 } } }