Introduction to METS (Metadata Encoding and Transmission Standard)
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Transcript of Introduction to METS (Metadata Encoding and Transmission Standard)
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04/19/23 1
Introduction to METS (Metadata Encoding and Transmission Standard)
Jerome McDonoughNew York University
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What was MOA2? Concept phase
Whitepaper published by CLIR Testbed phase
Use 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
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Who was MOA2? MOA2 whitepaper
Hurley, Price-Wilkin, Proffitt, Besser MOA2 testbed participants
Cornell University Library New York Public Library Penn State University Library Stanford University Library University of California, Berkeley
Library
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Why MOA2? A common object format allows us
to share the effort of developing tools/services
A common object format ensures interoperability of digital library materials as they are exchanged between institutions (including vendors)
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Transition to METS Continuing need to share, archive
& display digital objects but: Need more flexibility for varying
descriptive and administrative metadata
Need to support audio/video/other data formats
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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)
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Library of Congress as Maintenance Agency Provides hosting for developing
standard Documentation Website Listserv Vocabulary/Profile Registries
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The METS Format Create a single document format for
encoding digital library objects which can fulfill roles of SIP, AIP and DIP within the OAIS reference model
Initial scope limited to objects comprised of text, image, audio & video files
Promote interoperability of descriptive, administrative and technical metadata while supporting flexibility in local practice
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Technical Components Primary XML Schema Extension Schema Controlled Vocabularies
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METS XML Schema
METS Document
Header
Descript. MD
Admin. MD
File List
Link Struct.
Struct. Map
Behaviors
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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) or
Other METS documents
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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>
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Link Structure Records all links between nodes in
structural map Uses XLink/Xptr syntax Caveat Encoder: make sure your
structural map supports your link structure
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Content Files Listing Records file specific technical metadata
(checksum, file size, creation date/time) as well as providing access to file content
Files are arranged into groups, which can be arranged hierarchically
Files may be referenced (using Xlink) or contained within the METS document (in XML or as Base64 Binary)
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Descriptive Metadata Non-prescriptive/Multiple instances Desc. metadata associated with
entirety of METS object or subcomponents
Desc. metadata may be internal (XML or binary) or external (referenced by XLink) to METS document
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Administrative Metadata 4 Types: Technical, Rights, Source
Document, Digital Provenance Non-prescriptive/Multiple instances associated with entirety of METS
object or subcomponents may be internal (XML/binary) or
external (XLink) to METS document
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METS Header Metadata regarding METS document Creation/Last Modification
Date/Record Status Document Agents (Creator, Editor,
Archivist, Preservation, Disseminator, Rights Owner, Custodian, etc.)
Alternative Record ID values
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Behaviors Section Multiple Behaviors allowed for any
METS document Behaviors may operate on any part
of METS document May provide information on API,
service location, etc.
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METS Structure
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METS Structure
Oral History
Introduction
Q1 & Answer
Q2 & Answer
AIFF Master
TEI Tran-
scription
AES/EBUTech. Metadata
Text Tech. Metadata
MARC21 Record
Time Code Link
IDREF Link
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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)
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METS Controlled Vocabularies Known metadata types Known file address types (xptr,
time code, etc.) METS profiles
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METS: Development Status Version 1.0 Complete / Version 1.1
out for comment Anticipate formal endorsement by
DLF this summer Editorial Board working on further
development of schema, extension schema, controlled vocabularies, registries, documentation and education
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METS: Development Status Harvard Java Toolkit Library of Congress object browser UCB/NYU object browser XSLT:
Page turners – UC Berkeley, NYU METS2SMIL -- MSU
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METS: Next Steps Better documentation Training sessions (all over the place) Tool development (particularly open source) Define METS profiles and set up registry Establish registry of METS repositories Help spark extension schema development
(video tech. metadata, IP rights, digital provenance)
Work on controlled vocabularies for use in METS
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METS: Further Info METS Web Site:
http://www.loc.gov/standards/mets METS Mailing List: [email protected] …or contact me at