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Metadata ppt
- 1.
- 2. Definition of Metadata 2 ▸Metadata is data about data ▸ it is data that is used to describe another item's content. ▸ Metadata (data about data) is traditionally found in card catalogs in libraries. With the age of digital documents, metadata is used to describe the content of these documents.
- 3. Four functions ofMetadata ▸ Identify Content ▸ Manage Content ▸ Retrieve Content ▸ Usage of content 3
- 4. Types of Metadata AdministrativeDescriptiveStructural 4 Technical Preservation
- 5. Administrative Metadata ▸ Administrative Metadataused in managing and administering collections and information resources Example ▸ Acquisition information ▸ Rights and reproduction tracking ▸ Documentation of legal access requirements ▸ Location information ▸ Selection criteria for digitization 5
- 6. Descriptive Metadata ▸ Descriptive Metadataused to identify and describe collections and related information resources Example ▸ Cataloging records ▸ Finding aids ▸ Differentiations between versions ▸ Specialized indexes ▸ Hyperlinked relationships between resources 6
- 7. Structural metadata ▸ Structuralmetadata indicates how compound objects are put together. Example ▸ how pages are ordered to form chapters. 7
- 8. Technical Metadata ▸ TechnicalMetadata related to how a system functions or metadata behaves Examples ▸ Hardware and software documentation ▸ Technical digitization information, e.g., ▸ Formats, compression ratios, scaling routines ▸ Tracking of system response times ▸ Authentication and security data and passwords 8
- 9. Preservation Metadata ▸ PreservationMetadata related to the preservation management of collections and information resources Examples ▸ Documentation of physical condition of resources ▸ Documentation of actions taken to preserve physical and digital versions of resources, e.g., data refreshing and migration ▸ Documentation of any changes occurring during digitization or preservation 9
- 10. Metadata schemas ▸ Metadataschemas are also called element sets, property vocabularies. ▸ Optionally, they may specify: ▹ Rules for how content must be formulated (for example, how to identify the main title) ▹ Representation rules for content (for example, capitalization rules) ▹ Allowable content values (for example, terms must be used from a specified controlled vocabulary 10
- 11. Metadata standards --a selected list 11
- 12. Metadata schemas ▸ Manymetadata schemas are being developed in a variety of user environments and disciplines. ▹ Some of the most common ones are ▹ Dublin core ▹ MARC ▹ Schema.org 12
- 13. Dublin Core ▸ TheDublin Core Schema is a small set of vocabulary terms that can be used to describe web resources (video, images, web pages, etc.), as well as physical resources such as books or CDs, and objects like artworks. The original set of 15 classic metadata terms, known as the Dublin Core Metadata Element Set (DCMES), is endorsed in the following standards documents: ▸ IETF RFC 5013 ▸ ISO Standard 15836-2009 ▸ NISO Standard Z39.85 13
- 14. Dublin Core Element ▸Title ▸ Creator ▸ Subject ▸ Description ▸ Publisher ▸ Contributor ▸ Date ▸ Type 14 ▸ Format ▸ Identifier ▸ Source ▸ Language ▸ Relation ▸ Coverage ▸ Rights
- 15. MARC (MAchine-Readable Cataloging) ►MARC provides the mechanism by which computers exchange, use, and interpret bibliographic information, and its data elements make up the foundation of most library catalogs used today. 15
- 16. Schema.org Schema.org is sponsoredby major search engines (Google, Microsoft, Yahoo and Yandex) for webmasters and developers to use. The shared schemas, covering almost all kinds of entities that websites may contain, are developed by an open community process. 16
- 17.
Editor's Notes
- #4 1. Identify Content Metadata identifies content to give it a unique characterisation distinguishing it from other pieces of content. Identification metadata is descript metadata, and can include elements such as: Unique resource identifier (URI); Filename or file reference number; Author; Title 2. Manage Content Metadata plays a very important function in helping systems manage content. This is so that the system knows, for example, who should have access to the document, which applications should be used to display the file, what operations should be conducted on a file at given times or within certain workflows. In this function, administrative and structural metadata capture things like: Version number; Archiving date; Security and access permissions; Rights management settings; Retention schedule; File format; Linked resources 3. Retrieve Content Helping users to find and retrieve content is the function of metadata that is most closely connected with taxonomies. In this function, descriptive metadata includes things like: Taxonomy topics; Subject keywords added by users; Document descriptions 4. Track usage of content A more sophisticated use of metadata is to track the usage of a document and to connect content to other content. A well-known example of this is the Amazon message “people who bought this book also bought…” This information is collected automatically by the system and it associates content based on tracking user behaviours upon the content. In this function, examples of usage metadata might be: User ratings; Downloads data (who has downloaded it, or how often); Forwarding data (who has forwarded it, to whom); Search terms (search terms used immediately prior to a download); Links data (number and source of hyperlinks pointing to the content; links from the content to other pieces of content)