{
    "data": "https://ftp.vgingis.com/Download/VA_SiteAddress.txt.zip",
    "website": "http://vgin.maps.arcgis.com/home/item.html?id=100e5e12ddc14748a5ec3b8b997af13a",
    "license": {
        "text": "public domain",
        "attribution": false,
        "share-alike": false
    },
    "compression": "zip",
    "type": "http",
    "year": 2014,
    "coverage": {
        "US Census": {
            "geoid": "51",
            "state": "Virginia"
        },
        "country": "us",
        "state": "va"
    },
    "conform": {
        "type": "csv",
        "file": "VA_SiteAddress.txt",
        "lon": "LONG",
        "lat": "LAT",
        "number": "ADDRNUM",
        "street": "FULLNAME",
        "city": "PO_NAME",
        "district": "MUNICIPALITY",
        "region": "STATE",
        "postcode": {
          "function": "regexp",
          "field": "ZIP_5",
          "pattern": "(\d+),(\d+)",
          "replace": "$1$2"
        }
    }
}

{
    "data": "https://ftp.vgingis.com/Download/VA_SiteAddress.txt.zip",
    "website": "http://vgin.maps.arcgis.com/home/item.html?id=100e5e12ddc14748a5ec3b8b997af13a",
    "license": {
        "text": "public domain",
        "attribution": false,
        "share-alike": false
    },
    "compression": "zip",
    "type": "http",
    "year": 2014,
    "coverage": {
        "US Census": {
            "geoid": "51",
            "state": "Virginia"
        },
        "country": "us",
        "state": "va"
    },
    "conform": {
        "type": "csv",
        "file": "VA_SiteAddress.txt",
        "lon": "LONG",
        "lat": "LAT",
        "number": "ADDRNUM",
        "street": "FULLNAME",
        "city": "PO_NAME",
        "district": "MUNICIPALITY",
        "region": "STATE",
        "postcode": {
          "function": "regexp",
          "field": "ZIP_5",
          "pattern": "([0-9]{2}),([0-9]{3})",
          "replace": "$1$2"
        }
    }
}

Use [0-9] to fix build error and specify exact match sizes
Use [0-9] to fix build error and specify exact match sizes
