The range of skos:altLabel is the class of RDF plain literals.,skos:prefLabel, skos:altLabel and skos:hiddenLabel are pairwise disjoint properties.

An alternative lexical label for a resource.

Acronyms, abbreviations, spelling variants, and irregular plural/singular forms may be included among the alternative labels for a concept. Mis-spelled terms are normally included as hidden labels (see skos:hiddenLabel).

http://www.w3.org/2004/02/skos/core

alternative label