key (property)

{
    "$id": "https://schemas.optimade.org/defs/v1.2/properties/optimade/references/key",
    "$schema": "https://schemas.optimade.org/meta/v1.2/optimade/property_definition.json",
    "title": "key",
    "x-optimade-type": "string",
    "x-optimade-definition": {
        "label": "key_optimade_references",
        "kind": "property",
        "version": "1.2.0",
        "format": "1.2",
        "name": "key"
    },
    "type": [
        "string",
        "null"
    ],
    "description": "Used for alphabetizing, cross-referencing, and creating a label (the key field in the BibTeX specification).",
    "examples": [
        "smith2022"
    ],
    "x-optimade-unit": "inapplicable"
}