closed 4.2.1.1 2005-05-29T04:24:29.486-06:00 2004-06-12T21:43:12.178-06:00 TSD4.2 Archaeological Markup Language (ArchaeoML), version 0.9, February 2006. Created by David Schloen of the University of Chicago. Variable document type. A Variable document represents a descriptive variable of the type specified in the type attribute (e.g., nominal, ordinal, decimal, etc.). This value must be of a type appropriate to the variable type. Here, the links contain a (single) docID which points to a Set document of type= thesaurus.