In this section, we have briefly introduced how FRBR
structures can be used to improve and integrate digital li-
braries. FRBR-ized data can be held in separate distinct
repositories that can be utilized and shared by separate DLs.
A DL-type protocol can be used to access this content, and
that additional information added in the user-interface layer
of a componentized DL system. From this simple modular
architecture, FRBR-ized data can be used to provide a union
catalogue, improved search facilities where cataloging data
for a particular work varies due to indexation practice or
factual uncertainty, provide enriched alerting for accessions
and changes in a digital library, and support for encoding
accession data. In short, this type of information widens
and enrichens the facilities of the library for many tasks and
for readers and librarians alike.