Purpose

Provide universal, read-only, textual metadata (suitable for syndication, or consumption by external apps).

Anonymous permission

Title()

Content resource name

Creator()

Content resource author(s)

Subject()

Content resource keywords (list of strings; should be drawn from a controlled vocabulary).

Description()

Content resource abstract/summary/table-of-contents.

Publisher()

Content resource publisher (normally, the owner of the portal).

Contributors()

Additional content resource collaborators (list of strings)

Date()

Default date (effective/created/modified) for content resource (ISO format)

CreationDate()

Date content resource created (ISO format)

EffectiveDate()

Date content resource becomes effective (ISO format)

ExpirationDate()

Date content resource expires (ISO format)

ModificationDate()

Date content resource last modified (ISO format)

Type()

Content resource type (e.g., Zope meta_type, or a mapping from it).

Format()

Physical encoding (e.g., MIME type) of the content resource.

Identifier()

Content resource URL.

Language()

Content resource language, from RFC list (e.g., en-US).

Rights()

Copyright or other IP pertaining to the cntent resource.