A reference to a resource from which the present resource is derived. The topic of the content of the resource. The name given to the resource. The nature or genre of the content of the resource. That record might then be enhanced as needed to add additional information generally provided in the particular catalog.
Some projects convert data and use as basic record for reporting to national bibliography.
Searching across syntaxes and databases. Libraries have large systems with valuable information in metadata records in MARC format. Over the past few years with the expansion of electronic resource over the Internet, other syntaxes have also been considered for providing metadata. It will be important for systems to be able to search metadata in different syntaxes and databases and have commonality in the definition and use of elements.