Table 5.1 Metadata Types

TYPE	GOAL	SAMPLE ELEMENTS	SAMPLE IMPLEMENTATIONS
*Descriptive Metadata*	describing and identifying information resources at the local (system) level to enable searching and retrieving (e.g., searching an image collection to find paintings of animals) at the Web-level, enables users to discover resources (e.g., search the Web to find digitized collections of poetry).	unique identifiers (PURL, Handle) physical attributes (media, dimensions condition) bibliographic attributes (title, author/creator, language, keywords)	Handle PURL (Persistent Uniform Resource Locator) Dublin Core MARC HTML Meta Tags controlled vocabularies such as: Art and Architecture Thesaurus Categories for the Description of Works of Art
*Structural Metadata*	facilitates navigation and presentation of electronic resources provides information about the internal structure of resources including page, section, chapter numbering, indexes, and table of contents describes relationship among materials (e.g., photograph B was included in manuscript A) binds the related files and scripts (e.g., File A is the JPEG format of the archival image File B)	structuring tags such as title page, table of contents, chapters, parts, errata, index, sub-object relationship (e.g., photograph from a diary)	SGML XML Encoded Archival Description (EAD) MOA2, Structural Metadata Elements Electronic Binding (Ebind)
*Administrative Metadata*	facilitates both short-term and long-term management and processing of digital collections includes technical data on creation and quality control includes rights management, access control and use requirements preservation action information	Technical data such as scanner type and model, resolution, bit depth, color space, file format, compression, light source, owner, copyright date, copying and distribution limitations, license information, preservation activities (refreshing cycles, migration, etc.)	MOA2, Administrative Metadata Elements National Library of Australia, Preservation Metadata for Digital Collections CEDARS