{
    "$schema": "http://json-schema.org/schema#",
    "$schemaVersion": "0.0.1",
    "$id": "https://smart-data-models.github.io/dataModel.ERA/Certificate/schema.json",
    "modelTags": "ERA vocabulary, railway, train",
    "license": "https://smart-data-models.github.io/dataModel.ERA/Certificate/LICENSE.md",
    "derivedFrom": "http://data.europa.eu/949/NetRelation",
    "type": "object",
    "allOf": [
        {
            "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/GSMA-Commons"
        },
        {
            "$ref": "https://smart-data-models.github.io/data-models/common-schema.json#/definitions/Location-Commons"
        },
        {
            "properties": {
                "type": {
                    "type": "string",
                    "enum": [
                        "NetRelation"
                    ],
                    "description": "Property. NGSI data type. It has to be NetRelation"
                },
                "elementA": {
                    "type": "string",
                    "format": "uri",
                    "description": "Relationship. Element A"
                },
                "elementB": {
                    "type": "string",
                    "format": "uri",
                    "description": "Relationship. Element B"
                },
                "navigability": {
                    "type": "string",
                    "format": "uri",
                    "description": "Relationship. Navigability"
                },
                "positionOnA": {
                    "type": "string",
                    "format": "uri",
                    "description": "Relationship. Position on A"
                },
                "positionOnB": {
                    "type": "string",
                    "format": "uri",
                    "description": "Relationship. Position on B"
                }
            }
        }
    ],
    "required": [
        "id",
        "type"
    ],
    "title": "NetRelation + mapped from ERA ontology by Smart Data Models",
    "description": "Base class for defining edges in the connectivity graph representing the topological network."
}