Specify a database name, SPARQL endpoint URL, subject URI prefix, and (if desired) a regular expression of IDs. Note that the database name should be unique in the configuration and should not include spaces. In order to identify the ID in the database, you need to register the subject prefix. For example, 'http://purl.uniprot.org/uniprot/' is the prefix of UniProt. * mark is required field. Detailed operations are described in the Help for configuration page.