A category of user for whom the resource is intended. A summary of the content of the resource. Any form of the title used as a substitute or alternative to the formal title of the resource. Date (often a range) that the resource will become or did become available. Date of creation of the resource. The size or duration of the resource. The described resource pre-existed the referenced resource, which is essentially the same intellectual content presented in another format. The described resource includes the referenced resource either physically or logically. The described resource has a version, edition, or adaptation, namely, the referenced resource. The described resource is the same intellectual content of the referenced resource, but presented in another format. The described resource is a physical or logical part of the referenced resource. The described resource is referenced, cited, or otherwise pointed to by the referenced resource. The described resource is supplanted, displaced, or superseded by the referenced resource. The described resource requires the referenced resource to support its function, delivery, or coherence of content. Date of formal issuance (e.g. publication) of the resource. The described resource is a version, edition, or adaptation of the referenced resource. The material or physical carrier of the resource. Date on which the resource was changed The described resource references, cites, or otherwise points to the referenced resource. The described resource supplants, displaces, or supersedes the referenced resource. The described resource requires the referenced resource to support its function, delivery, or coherence of content. Spatial characteristics of the intellectual content of the resource. A list of subunits of the content of the resource. Temporal characteristics of the intellectual content of the resource. Date (often a range) of validity of the resource.