Dublin Core Definition:	The topic of the content of the resource.
MARC:	653 __ |a

19.1  Use this field for the 5 categories: Environment, Diversity, Infrastructure, Lifestyle, Livelihood.

19.2  Select multiple categories from the drop-down menu if needed. (Minutes 6/28/2000)

653	__ |a Environment
653	__ |a Diversity
653	__ |a Infrastructure
653	__ |a Lifestyle
653	__ |a Livelihood