{
    "coverage": {
        "US Census": {
            "geoid": "06013",
            "name": "Contra Costa County",
            "state": "California"
        },
        "country": "us",
        "state": "ca",
        "county": "Contra Costa"
    },
    "schema": 2,
    "layers": {
        "addresses": [
            {
                "name": "county",
                "data": "https://ccmap.cccounty.us/arcgis/rest/services/CCMAP/CCMAP/MapServer/0",
                "website": "http://www.contracosta.ca.gov/1818/GIS",
                "license": "http://www.ccmap.us/information.asp",
                "attribution": "Contra Costa County",
                "protocol": "ESRI",
                "note": "Details for the dataset (eg, projection) can be found here http://www.ccmap.us/Details.asp?Product=134492",
                "conform": {
                    "format": "geojson",
                    "number": {
                        "function": "prefixed_number",
                        "field": "full_address_search"
                    },
                    "street": {
                        "function": "postfixed_street",
                        "field": "full_address_search"
                    },
                    "city": "s_city"
                }
            }
        ]
    }
}

{
    "coverage": {
        "US Census": {
            "geoid": "06013",
            "name": "Contra Costa County",
            "state": "California"
        },
        "country": "us",
        "state": "ca",
        "county": "Contra Costa"
    },
    "schema": 2,
    "layers": {
        "addresses": [
            {
                "name": "county",
                "data": "https://ccmap.cccounty.us/arcgis/rest/services/CCMAP/CCMAP/MapServer/0",
                "website": "http://www.contracosta.ca.gov/1818/GIS",
                "license": "http://www.ccmap.us/information.asp",
                "attribution": "Contra Costa County",
                "protocol": "ESRI",
                "note": "Details for the dataset (eg, projection) can be found here http://www.ccmap.us/Details.asp?Product=134492",
                "conform": {
                    "format": "geojson",
                    "number": {
                        "function": "prefixed_number",
                        "field": "cccGIS_Assessor.ASSRADMIN.Parcel_DOIT_WEB.full_address_search"
                    },
                    "street": {
                        "function": "postfixed_street",
                        "field": "cccGIS_Assessor.ASSRADMIN.Parcel_DOIT_WEB.full_address_search"
                    },
                    "city": "cccGIS_Assessor.ASSRADMIN.Parcel_DOIT_WEB.s_city"
                }
            }
        ]
    }
}

Use full field name instead of alias
Use full field name instead of alias