{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": {
    "is-capability": {
      "pattern": "^(service|directory)$"
    },
    "is-name": {
      "pattern": "^[A-Za-z0-9_-]+$"
    },
    "has-valid-child": {
      "oneOf": [
        { "properties": { "relation": { "not": { "pattern": "child" } } } },
        { "required": [ "child_name" ] }
      ]
    }
  },
  "properties": {
    "program": {
      "$id": "/properties/program",
      "type": "object",
      "title": "Program information"
    },
    "uses": {
      "$id": "/properties/uses",
      "type": "array",
      "title": "Used capabilities",
      "uniqueItems": true,
      "items": {
        "$id": "/properties/uses/items/",
        "type": "object",
        "required": [
          "type",
          "source_path",
          "target_path"
        ],
        "properties": {
          "type": {
            "$id": "/properties/uses/items/properties/type",
            "type": "string",
            "title": "Used capability type",
            "$ref": "#/definitions/is-capability"
          },
          "source_path": {
            "$id": "/properties/uses/items/properties/source_path",
            "type": "string",
            "title": "Used capability source path"
          },
          "target_path": {
            "$id": "/properties/uses/items/properties/target_path",
            "type": "string",
            "title": "Used capability target path"
          }
        }
      }
    },
    "exposes": {
      "$id": "/properties/exposes",
      "type": "array",
      "title": "Exposed capabilities",
      "uniqueItems": true,
      "items": {
        "$id": "/properties/exposes/items/",
        "type": "object",
        "required": [
          "type",
          "source_path",
          "source",
          "target_path"
        ],
        "properties": {
          "type": {
            "$id": "/properties/exposes/items/properties/type",
            "type": "string",
            "title": "Exposed capability type",
            "$ref": "#/definitions/is-capability"
          },
          "source_path": {
            "$id": "/properties/exposes/items/properties/source_path",
            "type": "string",
            "title": "Exposed capability source path"
          },
          "source": {
            "$id": "/properties/exposes/items/properties/source",
            "type": "object",
            "title": "Exposed capability source component",
            "required": [
              "relation"
            ],
            "$ref": "#/definitions/has-valid-child",
            "properties": {
              "relation": {
                "$id": "/properties/exposes/items/properties/source/properties/relation",
                "type": "string",
                "title": "Exposed capability source component relation",
                "pattern": "^(self|child)$"
              },
              "child_name": {
                "$id": "/properties/exposes/items/properties/source/properties/child_name",
                "type": "string",
                "title": "Exposed capability source component child name",
                "$ref": "#/definitions/is-name"
              }
            }
          },
          "target_path": {
            "$id": "/properties/exposes/items/properties/target_path",
            "type": "string",
            "title": "Exposed capability target path"
          }
        }
      }
    },
    "offers": {
      "$id": "/properties/offers",
      "type": "array",
      "title": "Offered capabilities",
      "uniqueItems": true,
      "items": {
        "$id": "/properties/offers/items/",
        "type": "object",
        "required": [
          "type",
          "source_path",
          "source",
          "targets"
        ],
        "properties": {
          "type": {
            "$id": "/properties/offers/items/properties/type",
            "type": "string",
            "title": "Offered capability type",
            "$ref": "#/definitions/is-capability"
          },
          "source_path": {
            "$id": "/properties/exposes/items/properties/source_path",
            "type": "string",
            "title": "Offered capability source path"
          },
          "source": {
            "$id": "/properties/exposes/items/properties/source",
            "type": "object",
            "title": "Offered capability source component",
            "required": [
              "relation"
            ],
            "$ref": "#/definitions/has-valid-child",
            "properties": {
              "relation": {
                "$id": "/properties/offers/items/properties/source/properties/relation",
                "type": "string",
                "title": "Offered capability source component relation",
                "pattern": "^(self|realm|child)$"
              },
              "child_name": {
                "$id": "/properties/offers/items/properties/source/properties/child_name",
                "type": "string",
                "title": "Offered capability source component child name",
                "$ref": "#/definitions/is-name"
              }
            }
          },
          "targets": {
            "$id": "/properties/offers/items/properties/targets",
            "type": "array",
            "title": "Offered capability targets",
            "uniqueItems": true,
            "items": {
              "$id": "/properties/offers/items/properties/targets/items",
              "type": "object",
              "required": [
                "target_path",
                "child_name"
              ],
              "properties": {
                "target_path": {
                  "$id": "/properties/offers/items/properties/targets/items/target_path",
                  "type": "string",
                  "title": "Offered capability target path"
                },
                "child_name": {
                  "$id": "/properties/offers/items/properties/targets/items/child_name",
                  "type": "string",
                  "title": "Offered capability target child name",
                  "$ref": "#/definitions/is-name"
                }
              }
            }
          }
        }
      }
    },
    "children": {
      "$id": "/properties/children",
      "type": "array",
      "title": "Child components",
      "uniqueItems": true,
      "items": {
        "$id": "/properties/children/items",
        "type": "object",
        "required": [
          "name",
          "uri"
        ],
        "properties": {
          "name": {
            "$id": "/properties/children/items/properties/name",
            "type": "string",
            "title": "Child component name",
            "pattern": "^[a-zA-z0-9_-]+$",
            "$ref": "#/definitions/is-name"
          },
          "uri": {
            "$id": "/properties/children/items/properties/uri",
            "type": "string",
            "title": "Child component URI"
          }
        }
      }
    },
    "facets": {
      "$id": "/properties/facets",
      "type": "object",
      "title": "Facets",
      "description": "Freeform dictionary containing third-party metadata"
    }
  }
}