[
    {
        "regex": {
            "function": "extract",
            "description": "pull first 20 characters from description for mapping",
            "where": [
                {}
            ],
            "defn": [
                {
                    "regex": ".{1,20}",
                    "map": "y",
                    "field": "f20",
                    "flag": "",
                    "key": "{Description}",
                    "retain": "y"
                }
            ],
            "name": "First 20"
        },
        "sequence": 2,
        "name": "First 20",
        "srce": "dcard"
    }
]