Thumbnail The URL linking to a thumbnail. This may be used by the presentation software to present the thumbnail as a part of the record presentation. Optional Unbounded TEL Element Set for Objects N.B. Only describes the subset of TEL elements required by BLAP. URI A URI Uniform Resource Identifier The European Library (TEL) Description Recordid The unique identification of the record in the source database. The recordId is used for referencing the original record, linking by reference and for administrative purposes. In some cases it will allow records to be indexed without storing them centrally. It can be used in OpenURL for use by local services. Mandatory Unbounded