{
  "$id": "https://vana.org/data-schema.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Schema",
  "description": "Meta‑schema that validates a schema object containing a dataset schema and related metadata.",
  "type": "object",
  "required": ["name", "version", "dialect", "schema"],
  "properties": {
    "name": {
      "type": "string",
      "description": "Human‑readable name of the contract."
    },
    "version": {
      "type": "string",
      "description": "Semantic version of the contract's business logic (e.g. 1.1.0)."
    },
    "description": {
      "type": "string",
      "description": "Long‑form description of the dataset or API."
    },
    "dialect": {
      "type": "string",
      "description": "Primary language/format of the data schema.",
      "enum": ["sqlite", "json"]
    },
    "dialectVersion": {
      "type": "string",
      "description": "Optional: The version of the dialect's engine or specification the schema targets (e.g., '3' for SQLite v3). Omit for self-describing dialects like json."
    },
    "schema": {
      "description": "The actual schema definition. For 'sqlite', supply a DDL string; for 'json', embed a JSON Schema object."
    }
  },
  "additionalProperties": false,
  "allOf": [
    {
      "if": {
        "properties": { "dialect": { "const": "sqlite" } }
      },
      "then": {
        "properties": { "schema": { "type": "string" } }
      }
    },
    {
      "if": {
        "properties": { "dialect": { "const": "json" } }
      },
      "then": {
        "properties": { "schema": { "type": "object" } }
      }
    }
  ]
}