{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": {
    "path-clause": {
      "type": "string",
      "pattern": "^(/[^/]+)+$",
      "minLength": 1,
      "maxLength": 1024
    },
    "url-clause": {
      "type": "string",
      "pattern": "^[0-9a-z+\\-\\.]+://.+$",
      "minLength": 1,
      "maxLength": 4096
    },
    "startup-clause": {
      "type": "string",
      "pattern": "^(lazy|eager)$"
    },
    "durability-clause": {
      "type": "string",
      "pattern": "^(persistent|transient)$"
    },
    "name-clause": {
      "type": "string",
      "pattern": "^[0-9a-z_\\-\\.]+$",
      "minLength": 1,
      "maxLength": 100
    },
    "expose-source-clause": {
      "title": "Exposed capability source component",
      "type": "object",
      "oneOf": [
        {
          "required": [ "myself" ]
        },
        {
          "required": [ "child" ]
        }
      ],
      "properties": {
        "myself": {
          "type": "object",
          "title": "Component itself"
        },
        "child": {
          "type": "object",
          "title": "Component's child",
          "required": [ "name" ],
          "properties": {
            "name": {
              "title": "Child name",
              "allOf": [{ "$ref": "#/definitions/name-clause" }]
            }
          }
        }
      }
    },
    "offer-source-clause": {
      "title": "Offered capability source component",
      "type": "object",
      "oneOf": [
        {
          "required": [ "realm" ]
        },
        {
          "required": [ "myself" ]
        },
        {
          "required": [ "child" ]
        }
      ],
      "properties": {
        "realm": {
          "type": "object",
          "title": "Component's containing realm (parent component)"
        },
        "myself": {
          "type": "object",
          "title": "Component itself"
        },
        "child": {
          "type": "object",
          "title": "Component's child",
          "required": [ "name" ],
          "properties": {
            "name": {
              "title": "Child name",
              "allOf": [{ "$ref": "#/definitions/name-clause" }]
            }
          }
        }
      }
    },
    "offer-targets-clause": {
      "title": "Offered capability targets",
      "type": "array",
      "uniqueItems": true,
      "minItems": 1,
      "items": {
        "type": "object",
        "required": [
          "target_path",
          "dest"
        ],
        "properties": {
          "target_path": {
            "title": "Offered capability target path",
            "type": "string",
            "allOf": [{ "$ref": "#/definitions/path-clause" }]
          },
          "dest": {
            "title": "Offered capability target component",
            "type": "object",
            "oneOf": [
              {
                "required": [ "child" ]
              },
              {
                "required": [ "collection" ]
              }
            ],
            "properties": {
              "child": {
                "type": "object",
                "title": "Offered target component's child",
                "required": [ "name" ],
                "properties": {
                  "name": {
                    "title": "Child name",
                    "allOf": [{ "$ref": "#/definitions/name-clause" }]
                  }
                }
              },
              "collection": {
                "type": "object",
                "title": "Offered target component's collection",
                "required": [ "name" ],
                "properties": {
                  "name": {
                    "title": "Collection name",
                    "allOf": [{ "$ref": "#/definitions/name-clause" }]
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "properties": {
    "program": {
      "type": "object",
      "title": "Program information"
    },
    "uses": {
      "type": "array",
      "title": "Used capabilities",
      "uniqueItems": true,
      "items": {
        "type": "object",
        "oneOf": [
          {
            "required": [ "service" ]
          },
          {
            "required": [ "directory" ]
          }
        ],
        "properties": {
          "service": {
            "type": "object",
            "title": "Used service capability",
            "required": [
              "source_path",
              "target_path"
            ],
            "properties": {
              "source_path": {
                "title": "Used service source path",
                "allOf": [{ "$ref": "#/definitions/path-clause" }]
              },
              "target_path": {
                "allOf": [{ "$ref": "#/definitions/path-clause" }],
                "title": "Used service target path"
              }
            }
          },
          "directory": {
            "type": "object",
            "title": "Used service capability",
            "required": [
              "source_path",
              "target_path"
            ],
            "properties": {
              "source_path": {
                "title": "Used service source path",
                "allOf": [{ "$ref": "#/definitions/path-clause" }]
              },
              "target_path": {
                "allOf": [{ "$ref": "#/definitions/path-clause" }],
                "title": "Used service target path"
              }
            }
          }
        }
      }
    },
    "exposes": {
      "type": "array",
      "title": "Exposed capabilities",
      "uniqueItems": true,
      "items": {
        "type": "object",
        "oneOf": [
          {
            "required": [ "service" ]
          },
          {
            "required": [ "directory" ]
          }
        ],
        "properties": {
          "service": {
            "type": "object",
            "title": "Exposed service capability",
            "required": [
              "source",
              "source_path",
              "target_path"
            ],
            "properties": {
              "source": {
                "title": "Exposed service source component",
                "allOf": [{ "$ref": "#/definitions/expose-source-clause" }]
              },
              "source_path": {
                "title": "Exposed service source path",
                "allOf": [{ "$ref": "#/definitions/path-clause" }]
              },
              "target_path": {
                "allOf": [{ "$ref": "#/definitions/path-clause" }],
                "title": "Exposed service target path"
              }
            }
          },
          "directory": {
            "type": "object",
            "title": "Exposed directory capability",
            "required": [
              "source",
              "source_path",
              "target_path"
            ],
            "properties": {
              "source": {
                "title": "Exposed directory source component",
                "allOf": [{ "$ref": "#/definitions/expose-source-clause" }]
              },
              "source_path": {
                "title": "Exposed directory source path",
                "allOf": [{ "$ref": "#/definitions/path-clause" }]
              },
              "target_path": {
                "allOf": [{ "$ref": "#/definitions/path-clause" }],
                "title": "Exposed directory target path"
              }
            }
          }
        }
      }
    },
    "offers": {
      "type": "array",
      "title": "Offered capabilities",
      "uniqueItems": true,
      "items": {
        "type": "object",
        "oneOf": [
          {
            "required": [ "service" ]
          },
          {
            "required": [ "directory" ]
          }
        ],
        "properties": {
          "service": {
            "required": [
              "source",
              "source_path",
              "targets"
            ],
            "properties": {
              "source": {
                "title": "Offered service source component",
                "allOf": [{ "$ref": "#/definitions/offer-source-clause" }]
              },
              "source_path": {
                "title": "Offered service source path",
                "allOf": [{ "$ref": "#/definitions/path-clause" }]
              },
              "targets": {
                "title": "Offered service targets",
                "allOf": [{ "$ref": "#/definitions/offer-targets-clause" }]
              }
            }
          },
          "directory": {
            "required": [
              "source",
              "source_path",
              "targets"
            ],
            "properties": {
              "source": {
                "title": "Offered directory source component",
                "allOf": [{ "$ref": "#/definitions/offer-source-clause" }]
              },
              "source_path": {
                "title": "Offered directory source path",
                "allOf": [{ "$ref": "#/definitions/path-clause" }]
              },
              "targets": {
                "title": "Offered directory targets",
                "allOf": [{ "$ref": "#/definitions/offer-targets-clause" }]
              }
            }
          }
        }
      }
    },
    "children": {
      "type": "array",
      "title": "Child components",
      "uniqueItems": true,
      "items": {
        "type": "object",
        "required": [
          "name",
          "url",
          "startup"
        ],
        "properties": {
          "name": {
            "allOf": [{ "$ref": "#/definitions/name-clause" }],
            "title": "Child component name"
          },
          "url": {
            "allOf": [{ "$ref": "#/definitions/url-clause" }],
            "title": "Child component URI"
          },
          "startup": {
            "allOf": [{ "$ref": "#/definitions/startup-clause" }],
            "title": "Startup mode"
          }
        }
      }
    },
    "collections": {
      "type": "array",
      "title": "Collections",
      "uniqueItems": true,
      "items": {
        "type": "object",
        "required": [
          "name",
          "durability"
        ],
        "properties": {
          "name": {
            "allOf": [{ "$ref": "#/definitions/name-clause" }],
            "title": "Collection name"
          },
          "durability": {
            "allOf": [{ "$ref": "#/definitions/durability-clause" }],
            "title": "Durability"
          }
        }
      }
    },
    "facets": {
      "type": "object",
      "title": "Facets",
      "description": "Freeform dictionary containing third-party metadata"
    }
  }
}