{
    "$schema": "http://json-schema.org/draft-03/schema#",
    "description": "Timestamp on a Surveyor entity",
    "format": "\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(?:Z|[+-]\\d{2}:\\d{2})",
    "type": [
        "string",
        "null"
    ]
}