espocrm/schema/metadata/pdfDefs.json

{
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "$id": "https://www.espocrm.com/schema/metadata/pdfDefs.json",
    "title": "pdfDefs",
    "description": "PDF printing definitions for a scope.",
    "type": "object",
    "properties": {
        "dataLoaderClassNameList": {
            "type": "array",
            "items": {
                "anyOf": [
                    {"const": "__APPEND__"},
                    {"type": "string"}
                ]
            },
            "description": "List of classes that loads additional data for PDF. Classes should implement the interface Espo\\Tools\\Pdf\\DataLoader. Use __APPEND__ for extending."
        }
    }
}