Search engine BASE

BASE (Bielefeld Academic Search Engine) is a service provided by Bielefeld University Library that facilitates DDC browsing through the first three hierarchical levels of the DDC system in order to search for documents. When browsing by document type, the search results can be narrowed down further by using DDC numbers, for example. These DDC numbers are assigned using an automatic classification process; however, data sources that already contain DDC numbers are also used.