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An Introduction to MODS: An Introduction to MODS: The Metadata Object The Metadata Object
Description SchemaDescription Schema
Tech Talk By Daniel Gelaw AlemnehTech Talk By Daniel Gelaw Alemneh
October 17, 2007October 17, 2007
22Tech Talk: October 17, 2007Tech Talk: October 17, 2007
Background: Background: Why create Why create metadata?metadata?
Discover resources
Identify resources
Locate resources
Bring resources together
Distinguish between/among similar and dissimilar resources
Record rights information
Ensure long-term access & preservation
33Tech Talk: October 17, 2007Tech Talk: October 17, 2007
Approaches and Approaches and Issues need to be Issues need to be consideredconsidered
Level of description
Who will create metadata
Controlled vocabularies, Authority controls…
Presentation to users
Are you going to share it? Interoperability Rights information
44Tech Talk: October 17, 2007Tech Talk: October 17, 2007
MODS Overview MODS Overview
Metadata Object Description SchemaMetadata Object Description SchemaDescriptive Metadata StandardDescriptive Metadata StandardAn XML schema designed to encode descriptive An XML schema designed to encode descriptive metadata for digital objectsmetadata for digital objectsDeveloped at LC; Network Development and Developed at LC; Network Development and MARC Standards Office (version 3.3)MARC Standards Office (version 3.3)Originally designed for library use; may be used Originally designed for library use; may be used for other applicationsfor other applicationsDerived from MARCDerived from MARC
55Tech Talk: October 17, 2007Tech Talk: October 17, 2007
MODS DevelopmentMODS Development
XML increasingly used for markup for the webXML increasingly used for markup for the web
Investigating XML for MARC element setInvestigating XML for MARC element set
Need for descriptive metadata in XML; Need for descriptive metadata in XML; something simpler than MARC (with natural something simpler than MARC (with natural
language element names instead of numerical language element names instead of numerical field names)field names)
more interoperable than qualified DC (but rich more interoperable than qualified DC (but rich enough for complex digital objects)enough for complex digital objects)
66Tech Talk: October 17, 2007Tech Talk: October 17, 2007
What is needed?What is needed?
A standard for metadata content A standard for metadata content analogous to AACR2analogous to AACR2
A standardized framework for holding and A standardized framework for holding and exchanging metadata: analogous to the exchanging metadata: analogous to the MARC record MARC record
77Tech Talk: October 17, 2007Tech Talk: October 17, 2007
MODS features and AdvantagesMODS features and Advantages
Tags are language-based, not numeric (eg.100)Tags are language-based, not numeric (eg.100)
Elements are semantically parallel to MARCElements are semantically parallel to MARC
Doesn't assume use of any particular rulesDoesn't assume use of any particular rules
Element descriptions can be reusedElement descriptions can be reused
Use of XML schema allows for flexblity; Use of XML schema allows for flexblity;
Richer than Dublin Core Richer than Dublin Core (not too rich as UNTL Metadata, though)(not too rich as UNTL Metadata, though)
Hierarchical; Hierarchical; (supports rich description and works well UNTL)(supports rich description and works well UNTL)
88Tech Talk: October 17, 2007Tech Talk: October 17, 2007
MODS ElementsMODS Elements1. Title Info 1. Title Info
2. Name 2. Name
3. Type of resource 3. Type of resource
4. Genre 4. Genre
5. Origin Information 5. Origin Information
6. Language 6. Language
7. Physical description 7. Physical description
8. Abstract 8. Abstract
9. Table of contents 9. Table of contents
10. Target audience 10. Target audience
99Tech Talk: October 17, 2007Tech Talk: October 17, 2007
MODS Elements MODS Elements
10. Target audience 10. Target audience
11. Note 11. Note
12. Subject 12. Subject
13. Classification 13. Classification
14. Related item 14. Related item
15. Identifier 15. Identifier
16. Location 16. Location
17. Access conditions 17. Access conditions
18. Part 18. Part
19. Extension 19. Extension
20. Record Info 20. Record Info
1010Tech Talk: October 17, 2007Tech Talk: October 17, 2007
CrosswalksCrosswalks
Issues in converting existing records to MODS:
• Multiple elements are indicated for a single MODS element • Conversions without some loss of data could be difficult
• MARC to MODS • MODS to MARC• Dublin Core (simple) to MODS• UNTL to MODS
1313Tech Talk: October 17, 2007Tech Talk: October 17, 2007
But will MODS catch on?But will MODS catch on?Backed by Library of CongressBacked by Library of Congress
Interest from Libraries’ communityInterest from Libraries’ community 25 implementers25 implementers
There are more established competitors out There are more established competitors out there, there, Dublin Core, UNTL Metadata, etc.Dublin Core, UNTL Metadata, etc.
It might be difficult for MODS to make big It might be difficult for MODS to make big impact today (for all communities). However, impact today (for all communities). However, MODS offers exciting possibilities for the MODS offers exciting possibilities for the digital library!digital library!
1414Tech Talk: October 17, 2007Tech Talk: October 17, 2007
Useful addressesUseful addresses
MODSMODShttp://www.loc.gov/standards/mods/http://www.loc.gov/standards/mods/
METSMETShttp://www.loc.gov/standards/mets/ http://www.loc.gov/standards/mets/
UNTL to MODSUNTL to MODShttp://www.library.unt.edu/digitalprojects/assets/http://www.library.unt.edu/digitalprojects/assets/files/metadata/mapping/UNTL-MODS.pdffiles/metadata/mapping/UNTL-MODS.pdf