A subject or topic associated with the items in the collection Keywords or subject descriptors associated with items in the collection.
The terms used indicate the subject matter of the collection. Currently free-texts can be entered. However, subjects should be taken from a controlled vocabulary, namely from GND, LCSH and DDC though the preferred vocabularies are GND and LCSH. Where multiple keywords or subject descriptors are provided, a separate statement should be used for each keyword or descriptor. The importance of each statement is expressed by the applied order, beginning with the most important one.