Is this the correct way to describe an optional URI in a JSON Table Schema?
"description": "Contains the URL of a web page about a particular stop. This should be different from the agency_url and the route_url fields. The value must be a fully qualified URL that includes http:// or https://, and any special characters in the URL must be correctly escaped. See http://www.w3.org/Addressing/URL/4_URI_Recommentations.html for a description of how to create fully qualified URL values.",
When I used this to validate stops.txt data (unzipped and uploaded from a local file) using Good Tables, it returns,
Incorrect Type (stop_url): The value "" in column "stop_url" is not a valid String.