W3C

POWDER Current Status

This page summarizes the relationships among specifications, whether they are finished standards or drafts. Below, each title links to the most recent version of a document.

Completed Work

W3C Recommendations have been reviewed by W3C Members, by software developers, and by other W3C groups and interested parties, and are endorsed by the Director as Web Standards. Learn more about the W3C Recommendation Track.

Group Notes are not standards and do not have the same level of W3C endorsement.

Standards

2009-09-01

Protocol for Web Description Resources (POWDER): Grouping of Resources

The Protocol for Web Description Resources (POWDER) facilitates the publication of descriptions of multiple resources such as all those available from a Web site. This document describes how sets of IRIs can be defined such that descriptions or other data can be applied to the resources obtained by dereferencing IRIs that are elements of the set. IRI sets are defined as XML elements with relatively loose operational semantics. This is underpinned by the formal semantics of POWDER which include a semantic extension, defined separately. A GRDDL transform is associated with the POWDER namespace that maps the operational to the formal semantics.

2009-09-01

Protocol for Web Description Resources (POWDER): Description Resources

The purpose of the Protocol for Web Description Resources (POWDER) is to provide a means for individuals or organizations to describe a group of resources through the publication of machine-readable metadata, as motivated by the POWDER Use Cases [USECASES]. This document details the creation and lifecycle of Description Resources (DRs), which encapsulate such metadata. These are typically represented in a highly constrained XML dialect that is relatively human-readable. The meaning of such DRs are underpinned by formal semantics, accessible by performing a GRDDL Transform.

2009-09-01

Protocol for Web Description Resources (POWDER): Formal Semantics

This document underpins the Protocol for Web Description Resources (POWDER). It describes how the relatively simple operational format of a POWDER document can be transformed through two stages: first into a more tightly constrained XML format (POWDER-BASE), and then into an RDF/OWL encoding (POWDER-S) that may be processed by Semantic Web tools. Such processing is only possible, however, if tools implement the semantic extension defined within this document. The formal semantics of POWDER are best understood after the reader is acquainted with the Description Resources [DR] and Grouping of Resources [GROUP] documents.

Group Notes

2009-09-10

Protocol for Web Description Resources (POWDER): Test Suite

The document describes and presents test cases for the Protocol for Web Description Resources (POWDER). The test cases aim to indicate the correct formats of POWDER documents and illustrate various crucial aspects on the usage of POWDER documents, such as locating a document and infering information from it.

2009-09-01

Protocol for Web Description Resources (POWDER): Primer

POWDER — the Protocol for Web Description Resources — provides a mechanism to describe and discover Web resources and helps the users to make a decision whether a given resource is of interest. There are a variety of use cases: from providing a better means to describing Web resources and creating trustmarks to aiding content discovery, child protection and Semantic Web searches.

There are two varieties of POWDER: a complex, semantically rich variety, called POWDER-S, and a much simpler version, just called POWDER, which is intended as the primary transport mechanism for Description Resources. POWDER-S can be generated automatically from POWDER.

2007-10-31

POWDER: Use Cases and Requirements

This document sets out the use cases and requirements that have motivated the development of the Protocol for Web Description Resources (POWDER). The use cases address social and commercial needs to provide information about groups of Web resources, such as those available from a Web site, to aid the annotation and/or personalization of content for end users in varying delivery contexts.

Obsolete Specifications

These specifications have either been superseded by others, or have been abandoned. They remain available for archival purposes, but are not intended to be used.

Retired

2007-09-25

Protocol for Web Description Resources (POWDER): Web Description Resources (WDR) Vocabulary

This is the namespace document for the POWDER vocabulary. It provides a formal definition for each class and property, acting as a companion document to POWDER's Description Resources and Grouping of Resources Recommendations.

2007-09-25

Protocol for Web Description Resources (POWDER): Web Description Resources Datatypes (WDRD)

This is the namespace document for the XML schema used in the Protocol for Web Description resources (POWDER). It defines the datatypes used and the structure for Description Resources where these are serialized in XML.