{
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  "required": ["schemaVersion", "profile", "value", "loss"],
  "properties": {
    "schemaVersion": { "const": "aiwg.dataset-standards-exchange/v1" },
    "profile": {
      "type": "object", "required": ["id", "version"], "additionalProperties": false,
      "properties": { "id": { "type": "string", "minLength": 1 }, "version": { "type": "string", "minLength": 1 } }
    },
    "value": {},
    "loss": { "$ref": "#/$defs/lossReport" }
  },
  "additionalProperties": false,
  "$defs": {
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      "type": "object", "required": ["id", "version"], "additionalProperties": false,
      "properties": { "id": { "type": "string", "format": "uri" }, "version": { "type": "string", "minLength": 1 } }
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    "profileDescriptor": {
      "type": "object",
      "required": ["id", "standard", "version", "direction", "inputSchema", "outputSchema", "mappingImplementation", "supportedFeatures", "roundTripFields", "extensionNamespace", "unknownExtensionPolicy", "maturity", "useCases", "coverageBoundary"],
      "additionalProperties": false,
      "properties": {
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        "direction": { "enum": ["import", "export", "round-trip"] },
        "inputSchema": { "$ref": "#/$defs/schemaReference" }, "outputSchema": { "$ref": "#/$defs/schemaReference" },
        "mappingImplementation": { "type": "string", "minLength": 1 },
        "supportedFeatures": { "type": "array", "items": { "type": "string" }, "uniqueItems": true },
        "roundTripFields": { "type": "array", "items": { "type": "string" }, "uniqueItems": true },
        "extensionNamespace": { "type": "string", "format": "uri", "pattern": "/$" },
        "unknownExtensionPolicy": { "enum": ["preserve", "report", "reject"] },
        "maturity": { "enum": ["stable", "candidate", "descriptor-only"] },
        "useCases": { "type": "array", "minItems": 1, "items": { "type": "string", "minLength": 1 } },
        "coverageBoundary": { "type": "string", "minLength": 1 }
      }
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    "lossItem": {
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      "properties": {
        "category": { "enum": ["mapped", "omitted", "synthesized", "unsupported", "extension-carried"] },
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    },
    "lossReport": {
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        "schemaVersion": { "const": "aiwg.dataset-standards-exchange/v1" }, "profileId": { "type": "string" }, "profileVersion": { "type": "string" }, "direction": { "enum": ["import", "export"] },
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        "items": { "type": "array", "items": { "$ref": "#/$defs/lossItem" } },
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      }
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}