Optional URI reported as incorrect type

[Stephen-Gates]

I raised this issue in the Open Knowledge forum and was requested by @danfowler to add it here.

Using this JSON to describe an optional URI column,

{
  "name": "stop_url",
  "description": "Contains the URL of a web page about a particular stop.",
  "type": "string",
  "format": "uri",
  "constraints": {
     "required": false
  }
}

using GoodTables, I am returned,

Incorrect Type (stop_url):  The value "" in column "stop_url" is not a valid String.

I raised a similar validation error on frictionlessdata/goodtables-web#64, sorry if that was in the wrong place.

[pwalsh]

@roll if this acts correctly in v1 I am happy to close this.

[roll]

With schema:

{
    "fields": [
        {
          "name": "stop_url",
          "description": "Contains the URL of a web page about a particular stop.",
          "type": "string",
          "format": "uri",
          "constraints": {"required": false}

        }
    ]
}

New version of goodtables works FINE:

$ python -m goodtables.cli --order-fields table tmp/issue109.csv --
schema tmp/issue109.json
DATASET
=======
{'error-count': 10, 'table-count': 1, 'time': 1.304, 'valid': False}

TABLE [1]
=========
{'error-count': 10,
 'headers': ['stop_id',
             'stop_code',
             'stop_name',
             'stop_desc',
             'stop_lat',
             'stop_lon',
             'zone_id',
             'stop_url',
             'location_type',
             'parent_station',
             'platform_code'],
 'row-count': 1000,
 'time': 1.286,
 'valid': False}
---------
[-,1] [extra-header] There is an extra header in column 1
[-,2] [extra-header] There is an extra header in column 2
[-,3] [extra-header] There is an extra header in column 3
[-,4] [extra-header] There is an extra header in column 4
[-,5] [extra-header] There is an extra header in column 5
[-,6] [extra-header] There is an extra header in column 6
[-,7] [extra-header] There is an extra header in column 7
[-,9] [extra-header] There is an extra header in column 9
[-,10] [extra-header] There is an extra header in column 10
[-,11] [extra-header] There is an extra header in column 11

[pwalsh]

@roll excellent.

@Stephen-Gates I know you are not using command line, but the new goodtables is spectacular, and, we'll be exposing it via some web services from December onwards. Hang on tight, and also, follow the Labs blog for updates

[Stephen-Gates]

Thanks @pwalsh. Seat belt fastened. Let me know if I can help test or write something.