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Introduction to METS (Metadata Encoding and Transmission Standard) Jerome McDonough New York...
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Transcript of Introduction to METS (Metadata Encoding and Transmission Standard) Jerome McDonough New York...
Introduction to METS (Metadata Encoding and Transmission Standard)
Jerome McDonoughNew York University
What was MOA2?
Concept phaseWhite paper published by CLIR
Testbed phaseUse of ideas generated in the concept phase by real life participants (http://sunsite.berkeley.edu/moa2/)Included metadata capture DB, Java object browser, and MOA2 DTD
Who was MOA2?
MOA2 whitepaper
Hurley, Price-Wilkin, Proffitt, BesserMOA2 testbed participants
Cornell University LibraryNew York Public LibraryPenn State University LibraryStanford University LibraryUniversity of California, Berkeley Library
Why MOA2?
A common object format allows us to share the effort of developing tools/servicesA common object format ensures interoperability of digital library materials as they are exchanged between institutions (including vendors)
Transition to METS
Continuing need to share, archive & display digital objects but:Need more flexibility for varying descriptive and administrative metadataNeed to support audio/video/other data formats
Who is METS?Community-based development process
UC Berkeley, Harvard, Library of Congress, Michigan State University, METAe, Australian National Library, RLG, California Digital Library, Cornell, University of Virginia (not a complete list)….METS Editorial Board (UC, Harvard, LC, MSU, RLG, DCMI, MIT, NYU, OCLC, PFA, Stanford, Oxford, British Library, U. Alberta, Göttingen)
Maintenance Agency
Web hosting for developing standard and documentationListservs for METS community and editorial boardVocabulary/Profile Registries
The Library of Congress provides:
The METS FormatCreate a single document format for encoding digital library objects which can fulfill roles of SIP, AIP and DIP within the OAIS reference modelInitial scope limited to objects comprised of text, image, audio & video filesPromote interoperability of descriptive, administrative and technical metadata while supporting flexibility in local practice
METS XML Schema
METS Document
Header
Descript. MD
Admin. MD
File List
Link Struct.
Struct. Map
Behaviors
Structural Map
Object modeled as tree structure (e.g., book with chapters with subchapters….)Every node in tree can be associated with descriptive/administrative metadata and…Individual/multiple files (or portions thereof) orOther METS documents
Structural Map
<div type=“book” label=“Hunting of the Snark”><div type=“chapter” label=“Fit the First”>
<fptr>…</fptr></div><div type=“chapter” label=“Fit the Second”>
<fptr>…</fptr></div>…
</div>
Link Structure
Records all links between nodes in structural mapUses XLink/Xptr syntaxCaveat Encoder: make sure your structural map supports your link structure
Content Files Listing
Records file specific technical metadata (checksum, file size, creation date/time) as well as providing access to file contentFiles are arranged into groups, which can be arranged hierarchicallyFiles may be referenced (using Xlink) or contained within the METS document (in XML or as Base64 Binary)
Descriptive Metadata
Non-prescriptive/Multiple instancesDesc. metadata associated with entirety of METS object or subcomponentsDesc. metadata may be internal (XML or binary) or external (referenced by XLink) to METS document
Administrative Metadata
4 Types: Technical, Rights, Source Document, Digital ProvenanceNon-prescriptive/Multiple instancesassociated with entirety of METS object or subcomponentsmay be internal (XML/binary) or external (XLink) to METS document
METS Header
Metadata regarding METS documentCreation/Last Modification Date/Record StatusDocument Agents (Creator, Editor, Archivist, Preservation, Disseminator, Rights Owner, Custodian, etc.)Alternative Record ID values
Behaviors Section
Multiple Behaviors allowed for any METS documentBehaviors may operate on any part of METS documentMay provide information on API, service location, etc.
METS Structure
Oral History
Introduction
Q1 & Answer
Q2 & Answer
AIFF Master
TEI Tran-scription
AES/EBUTech. Metadata
Text Tech. Metadata
MODS Record
Time Code Link
IDREF Link
METS Extension Schema
Descriptive Metadata (DC, MARC, MODS)Administrative Metadata
Technical (image, text, audio, video)IP Rights (XrML, ODRL, MPEG 21, DRM Core)Digital Provenance (capture/migration)
Controlled Vocabularies
Known metadata typesKnown file address types (xptr, time code, etc.)METS profiles
Development Status
Version 1.3 Complete; Version 1.4 out soonFormally endorsed by Digital Library FederationRegistered with NISOEditorial Board working on further development of schema, extension schema, controlled vocabularies, registries, documentation and education
Development StatusHarvard Java Toolkit
http://hul.harvard.edu/mets/
CCS GmbH docWorkshttp://www.ccs-gmbh.de/index_e.html
DSpace, FEDORA, SRB, Greenstone (RSN), Cheshire 3 (also RSN)XSLT:
NYU Page turner & METS2SMIL
http://dlib.nyu.edu/metstools/ CDL MOA2METS converter
http://sunsite.berkeley.edu/mets/moa2mets/
MSU METS2SMIL
Next StepsBetter documentationMore Opening Days (all over the place)Tool development (particularly open source)Encourage development of METS ProfilesHelp spark extension schema development (video tech. metadata, IP rights, digital provenance)Work on controlled vocabulariesPromote interoperability with courseware systems (IMS & SCORM)
Further Info
METS Web Site: http://www.loc.gov/standards/mets
METS Community Mailing List: [email protected]
…or contact me at [email protected]