Don't limit gist:containedText to Text subjects

[rjyounes]

There is no formal limitation, but the definition is "Links to the string corresponding to Text."

It's not only Text objects that can have containedText - e.g., Addresses and other types of Content can. (Or should Address actually be a subclass of Text rather than Content? - though the point about containedText still applies.) Just because Content is not limited to Text doesn't mean it wouldn't be valuable to use containedText for its text.

[uscholdm]

The change has been done #989. The current version is:

gist:containedText
	a owl:DatatypeProperty ;
	rdfs:range xsd:string ;
	skos:definition "A string that is closely associated with an individual."^^xsd:string ;
	skos:example
		"The string associated with a tag."^^xsd:string ,
		"The string associated with text content."^^xsd:string
		;
	skos:prefLabel "contained text"^^xsd:string ;
	gist:domainIncludes
		gist:Tag ,
		gist:Text
		;
	.

See also #594