Как я присоединяю местоположения исходного кода к плагинам в моей целевой платформе RCP Eclipse?

С помощью Jason Desrosiers я наконец нашел решение и для моего вложенного json.

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "required": [
        "apiVersion",
        "apiDate"
    ],
    "anyOf": [
        {
            "properties": {
                "general": {
                    "properties": {
                        "documentType": { "enum": ["invoice"] },
                        "references": {
                            "required": ["invoiceId", "invoiceDate"]
                        }
                    }
                }
            }
        },
        {
            "properties": {
                "general": {
                    "properties": {
                        "documentType": { "enum": ["creditNote"] },
                        "references": {
                            "required": ["creditNoteId", "creditNoteDate"]
                        }
                    }
                }
            }
        }
    ], 
    "properties": {
        "apiVersion": {
            "type": "string",
            "description": "The version of the json file"
        },
        "apiDate": {
            "type": "string",
            "description": "The date when the json version was published"
        },
        "general": {
            "$ref": "#/definitions/general_identifiers",
            "references": {
                "type": "object",
                "properties": {
                    "invoiceId": {
                        "type": "string"
                    },
                    "invoiceDate": {
                        "type": "string"
                    },
                    "creditNoteId": {
                        "type": "string"
                    },
                    "creditNoteDate": {
                        "type": "string"
                    }
                } 
            }
        }
    },
    "definitions" : {
        "general_identifiers" : {
            "type": "object",
            "required": [
                "documentType"
            ],
            "properties": {
                "documentType": {
                    "enum": [
                        "invoice",
                        "creditNote"
                    ]
                }
            }
        }
    }
}