Description: The classification field indicates the broad substantive topic(s) that the data cover. Library of Congress subject terms may be used here. The "vocab" attribute is provided for specification of the controlled vocabulary in use, e.g., LCSH, MeSH, etc. The "vocabURI" attribute specifies the location for the full controlled vocabulary. Maps to Dublin Core Subject element. Inclusion of this element in the codebook is recommended.
Example(s):
<topcClas vocab="LOC Subject Headings" vocabURI="http://www.loc.gov/catdir/cpso/lcco/lcco.html"> Public opinion -- California -- Statistics</topcClas> <topcClas vocab="LOC Subject Headings" vocabURI="http://www.loc.gov/catdir/cpso/lcco/lcco.html">Elections -- California</topcClas>