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MARC and XML |
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MODS introduction |
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Uses |
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Features |
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Advantages |
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MODS relationship to other metadata schemes |
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MODS Projects |
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Importance of descriptive metadata in current
environment |
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Large investments in MARC systems |
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Retooling to make use of the flexibility of XML |
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Libraries may receive records using other
metadata schemes in XML |
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Descriptive metadata may come as part of digital
objects |
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Collaborative use of metadata for access |
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OAI harvesting |
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Z39.50 and SRU/SRW |
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Need to take advantage of XML |
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Establish standard MARC 21 in an XML structure |
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Take advantage of freely available XML tools |
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Need simpler (but compatible) alternatives |
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Development of MODS |
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Need interoperability with different schemas |
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Assemble coordinated set of tools |
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Need continuity with current data |
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Provide flexible transition options |
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MARCXML record |
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XML exact equivalent of MARC (2709) record |
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Lossless/roundtrip conversion to/from MARC 21
record |
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Simple flexible XML schema, no need to change
when MARC 21 changes |
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Presentations using XML stylesheets |
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LC provides converters (open source) |
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http://www.loc.gov/standards/marcxml |
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Metadata Object Description Schema |
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Descriptive metadata standard |
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Initiative of Network Development and MARC
Standards Office at LC |
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Uses XML Schema language |
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Originally designed for library applications,
but may be used for others |
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A derivative of MARC |
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As a rich (but not too rich) XML metadata format
for emerging initiatives |
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SRU/SRW: search and retrieval XML format |
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METS |
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to represent metadata for harvesting (OAI) |
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As a core element set for convergence between
MARC and non-MARC XML descriptions |
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For original resource description in XML syntax
that is simpler than full MARC |
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Element set is compatible with existing
descriptions in large library databases |
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Element set is richer than Dublin Core but
simpler than full MARC |
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Language tags are more user-friendly than MARC
numeric tags |
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Hierarchy allows for rich description,
especially of complex digital objects |
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Rich description that works well with
hierarchical METS objects |
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Uses language-based tags |
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Elements share definitions with equivalents
in MARC |
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Particularly applicable to digital resources |
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MODS does not assume the use of any specific
rules for description |
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Element descriptions are reused throughout the
schema |
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Some repackaging of redundant elements |
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Use of XML schema allows for flexibility and
availability of freely available tools |
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Title Info |
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Name |
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Type of resource |
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Genre |
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Origin Info |
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Language |
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Physical description |
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Abstract |
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Table of contents |
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Target audience |
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Note |
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Subject |
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Classification |
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Related item |
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Identifier |
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Location |
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Access conditions |
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Extension |
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Record Info |
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Open listserv collaboration of possible
implementors, LC coordinated (1st half 2002) |
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First comment and use period: June – December
2002 |
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Version 2.0 Feb. 2003-Dec. 2003 |
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MODS version 3.0 has been stable for over a
year; about to issue 3.1 |
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Registration approved by National Information
Standards Organization (NISO) |
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Recently issued companion for authority metadata
(MADS) |
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Compatible with MARC |
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General purpose: not tied to particular type of
material |
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Other descriptive metadata schemes: |
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DC (general resource discovery) |
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EAD (archival; finding aids) |
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ONIX (publishers) |
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VRA Core (visual resources) |
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CSGDM (geospatial) |
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TEI header (marked up text) |
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MODS has structure |
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Names |
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Publication information (originInfo) |
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Related item |
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Subject |
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MODS is more compatible with library data |
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Semantics |
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Conversions |
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Relationships between elements |
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Includes record management (administrative
metadata) information |
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Music record in MARC |
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Music record in MARCXML |
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Music record in MODS |
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Describing electronic resources |
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AV project, web archiving |
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Incorporation with XML resources |
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METS projects for digital resources (e.g. IHAS,
Blackmun) |
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OAI collections |
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LC offers MODS, MARCXML, DC simple |
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SRU/SRW: can get records in MODS |
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MINERVA: LC’s web archiving project (based on
specific themes) |
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Exploring issues with born digital resources |
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MODS used for descriptive metadata |
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Election 2002 Web archive |
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Collaboration with Internet Archive,
Webarchivist.org |
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Selective collection of archived sites July-Nov.
2002 |
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MODS records for each site (multiple captures) |
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Other collections: 9/11, 107th
Congress, War in Iraq, Election 2004 |
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Title |
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Name (structured form) |
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Abstract |
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Date captured |
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Genre (value always “Web site”) |
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Physical description (file formats) |
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Identifier (base URL) |
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Language |
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Access conditions/rights management |
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Subject |
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Metadata and search page done at LC |
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107th Congress Collection search page |
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107th Congress Collection browse |
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Record display |
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Air Force Times record in XML |
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Creating METS objects |
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Use of Fedora digital repository software |
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MODS used for descriptive metadata |
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Display derived from METS/MODS objects |
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I Hear America Singing |
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http://www.loc.gov/ihas |
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MODS XML record |
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METS document with MODS embedded |
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MusicAustralia |
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MODS as exchange format between National Library
of Australia and ScreenSoundAustralia |
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Allows for consistency with MARC data |
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http://www.musicaustralia.org/ |
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Many METS based projects |
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Chopin Early Editions (University of Chicago
Library) |
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Digital library projects |
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MODS works well with METS |
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Allows for description at any hierarchical level |
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Flexibility of schema may provide richer linking
capability than MARC |
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LC use |
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Experiment with MODS for large collections of
Web sites |
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Collection level record with link to MODS
individual records |
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Exploring MODS tools for input and searching |
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Exploring integrating access with other records |
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Make available via Open Archives Initiative
Protocol |
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MODS is particularly useful for |
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compatibility with existing bibliographic data |
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embedded descriptions in relatedItem |
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Rich, hierarchical descriptions that work well
with METS structural map |
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“out of the box” schema; can use
<extension> for local elements and to bring in external elements from
other schemas |
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Notes
