sort_string constant
sort_string [Expects: http://www.w3.org/2001/XMLSchema#string]
To specify the string to be used for national-language-specific sorting. Used as a property parameter only.
Can be used on all classes in this vocabulary
Implementation
static const sort_string = IriTerm.prevalidated(
'http://www.w3.org/2006/vcard/ns#sort-string',
);