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Abstract

This paper provides an introduction to the Metadata Object Description Schema (MODS), a MARC21 compatible XML schema for descriptive metadata. It explains the requirements that the schema targets and the special features that differentiate it from MARC, such as user-oriented tags, regrouped data elements, linking, recursion, and accommodations for electronic resources.

Source

Library hi tech. 22(2004) no.1, S.82-88

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Abstract

The Library of Congress (LC) has many of the same challenges as other libraries, especially large ones. LC has many different types of resources - books, journals, maps, music, manuscripts, audio, moving image, still image, artifacts, electronic - with large collections of each. Different levels of access are needed for this material: for some, collection level bibliographic description is adequate; for many, item level access is adequate; but for others, such as sound recordings, analytic, or sub unit access is highly desirable.The sizes of the LC collections are a major challenge - over 125 million non-electronic and over 3 million electronic items (and growing rapidly). And finally, electronic resources are presenting us with new issues - from metadata to preservation to storage to linking techniques. LC has tried to approach these challenges from a service perspective. Access must be successful for the end user, which mandates as much coherence and consistency in the metadata as possible and access systems that are easy to use. This paper focuses an the Library of Congress' perspective an metadata in the following three areas: (1) descriptive metadata in our current operations, (2) pathways that are developing that will support possible evolution in the future, and (3) broader metadata needs with digital material. The discussion is from a metadata element set and format point of view, not a cataloging data and cataloging rules view. Most acronyms used in this paper are expanded in an Appendix.

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Abstract

A key component for the successful preservation of digital resources is going to be the metadata that enables automated preservation processes to take place. The number of digital items will preclude human handling and the fact that these resources are electronic makes them logical for computer driven preservation activities. Over the last decade there have been a number of digital repository experiments that took different approaches, developed and used different data models, and generally moved our understanding forward. This paper reports on a recent initiative, PREMIS, that builds upon concepts and experience to date. It merits careful testing to see if the metadata identified can be used generally and become a foundation for more detailed metadata. And how much more will be needed for preservation activities? Initiatives for additional technical metadata and document format registries are also discussed.

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Date

27. 8.2011 14:22:38