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Metadata Quality

Metadata Quality. SLIS 5223: Metadata and Networked Information Organization and Retrieval William E. Moen Spring 2005. The meaning of quality. Is beauty in the eye of the beholder? Can there be criteria to assess quality? How has quality been addressed in library cataloging?

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Metadata Quality

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  1. Metadata Quality SLIS 5223: Metadata and Networked Information Organization and Retrieval William E. Moen Spring 2005

  2. The meaning of quality • Is beauty in the eye of the beholder? • Can there be criteria to assess quality? • How has quality been addressed in library cataloging? • Are quality criteria dependent on context? • Who defines quality? • Do users and metadata creators have common interests in quality? SLIS 5223 -- Metadata Quality

  3. Early metadata quality analysis • An Evaluation of the Federal Government’s Implementation of the Government Information Locator Service (GILS) • Focus was on record content from a user’s perspective • To assess metadata record quality in terms of completeness and accuracy • To explore the relationship of selected characteristics of records and serviceability in networked information discovery and retrieval (NIDR) • To develop recommendations for future application or adaptation of the method SLIS 5223 -- Metadata Quality

  4. Criteria for GILS record analysis • Completeness • Number of Elements per Record • Practice of Presenting “Blank” Elements • Utilization and Selected Characteristics of “Mandatory” Elements • Utilization and Characteristics of Selected “Optional” Elements • Profile • Record Types Record Aggregation • Objects Represented • Containers/Dissemination Media (e.g., CD–ROM, Fax, Print, Video, Web) • Accuracy • Format and Formatting Errors • Spelling and Typographical Errors • Serviceability • Capitalization • Citation of Legislation • Definition of Acronyms • Element Display Order • Fielded–Search Option • File Formats • Hypertext • Indentation • Locally Defined Elements SLIS 5223 -- Metadata Quality

  5. Access Accuracy Availability Compactness Compatibility Comprehensiveness Content Consistency Cost Data Structure Ease Of Creation Ease Of Use Economy Flexibility Fitness For Use Informativeness Protocols Quantity Reliability Standard Timeliness Transfer Usability General criteria from lit review SLIS 5223 -- Metadata Quality

  6. Hillmann’s Quality Measures • Context is Open Archives Initiative Protocol for Metadata Harvesting and the National Science Digital Library • Completeness • Provenance • Accuracy • Conformance to expectations • Logical consistency or coherence • Timeliness • Accessibility SLIS 5223 -- Metadata Quality

  7. Quality Criteria Does the element set completely describe the objects?  Are all relevant elements used for   each object? Compliance Indicators Application Profile; documentation Visual view; sample Completeness SLIS 5223 -- Metadata Quality

  8. Quality Criteria Who is responsible for creating, extracting, or transforming the metadata?  How was the metadata created or extracted? What transformations have been done on the data since its creation? Compliance Indicators OAI server info, File info, TEI Header OAI Provenance; colophon or file description OAI About Provenance SLIS 5223 -- Metadata Quality

  9. Quality Criteria Have accepted methods been used for creation or extraction? What has been done to ensure valid values and structure? Are default values appropriate, and have they been appropriately used? Compliance Indicators OAI About; documentation OAI About; visual view; sample; knowledge of source provider practices; documentation for creator-provided metadata; known-item search tests Known-item search tests; visual view Accuracy SLIS 5223 -- Metadata Quality

  10. Quality Criteria Does metadata describe what it claims to? Are controlled vocabularies aligned with audience characteristics and understanding of the objects? Are compromises documented and in line with community expectations? Compliance Indicators Visual view; external documentation; high ratio of populated elements per record Visual view, sample, documentation; expert review Documentation; user assessment studies Conformance to expectations SLIS 5223 -- Metadata Quality

  11. Quality Criteria Is data in elements consistent throughout? How does it compare with other data within the community? Compliance Indicators Visual view Research or knowledge of other community data; documentation Logical consistency or coherence SLIS 5223 -- Metadata Quality

  12. Quality Criteria Is metadata regularly updated as the resources change? Are controlled vocabularies updated when relevant? Compliance Indicators Sample or date sort of administrative information Test against known changes in relevant vocabularies Timeliness SLIS 5223 -- Metadata Quality

  13. Quality Criteria Is an appropriate element set for audience and community being used? Is it affordable to use and maintain? Does it permit further value-adds? Compliance Indicators Research or knowledge of other community data; documentation Experience of other implementers; evidence of licensing or other costs Standard format; extensible schema Accessibility SLIS 5223 -- Metadata Quality

  14. Levels of metadata quality • Semantic structure: element set level • Syntactic structure: encoding level • Content: data value level SLIS 5223 -- Metadata Quality

  15. Getting to quality • What is needed to produce quality metadata? • Who defines what quality is? SLIS 5223 -- Metadata Quality

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