W3C:

2008-06-30: The Protocol for Web Description Resources (POWDER) Working Group has published two Protocol for Web Description Resources (POWDER) Working Drafts: Grouping of Resources and Description Resources. The first document describes how to publish descriptions of multiple resources such as all those available from a Web site. These descriptions are always attributed to a named individual, organization or entity that may or may not be the creator of the described resources. The second publication provides a means for individuals or organizations to create machine-readable descriptions. Learn more about the Semantic Web Activity. (Permalink)