The Library of Congress has a free tool available for the display of MARC records. It takes a set of records and displays them using the Functional Requirements for Bibliographical Records. Not sure if it could become a piece of Koha, but just wanted to let you know it is available and might save some work if it could be pluged in. Sincrely, David Bigwood bigwood@lpi.usra.edu Lunar & Planetary Institute Cataloging news: http://www.catalogablog.blogspot.com http://www.loc.gov/marc/marc-functional-analysis/frbrdisplay.html#intro In 2001, the Network Development and MARC Standards Office released the publication, "Displays for Multiple Versions from MARC 21 and FRBR," which outlined how the FRBR (Functional Requirements for Bibliographic Records) model can be used to cluster bibliographic records in more meaningful displays to assist users in selecting items from bibliographic collections. It contained several hierarchical display examples of bibliographic data using the FRBR model. The FRBR Display Tool takes the work done in "Displays for Multiple Versions from MARC 21 and FRBR" one step further. It transforms the bibliographic data found in MARC record files into meaningful displays by grouping the bibliographic data into the "Work," "Expression" and "Manifestation" FRBR concepts.