CapURLString
This textual convention defines the URL string. The Universal Resource Locator (URL). The URL strings are compact string representation for a resource available via internet. This is the address location of the page to load. The string should represent a fully qualifying string with the format 'protocol:/server/page'. In general the string should point to any value that can be saved/loaded. Any limitation for the URL must be defined as part of the description of any object which uses this syntax. The description of any object which uses this syntax must specifically describe the meaning of zero length value.