CC/PP Working Group Charter

Editor: Johan Hjelm, Ericsson and Kazuhiro Kitagawa, W3C

Johan Hjelm, August 17, 1999.
Kazuhiro Kitagawa, January 18, 2001, Revised

The CC/PP Working Group is a Working Group of the W3C and follows the process as given in the Process Document. This is the charter for this Working Group.

See also: Briefing package


1. Scope

2. Schedule of Deliverables

3. Relationship with Other Activities

4. Working Group Membership

4.1 Invited Experts

5. Meetings and Coordination

6. Intellectual Property Rights

7. Confidentiality

1. Scope

This briefing package describes a working group to specify an information structure, based on RDF. The group will address the structured description of the context of a user, e.g. for capabilities and preferences exchange. 

The working group will specify a structure in RDF and a schema for the context information. It will also present a base vocabulary, and a model describing how trust can be shared in this framework. The working group will also develop guidelines for how to implement the mechanisms, and for how to extend the schema and vocabulary; and create new vocabularies.

The working group will work in close cooperation with other working groups in the W3C, such as the CSS working group, the HTML working group, the P3P working group, and the SYMM working group. Members of the working group will be permanent liaisons to other W3C working groups.

The working group is dependent on the RDF syntax and model and schema recommendations, and will use a general metadata transport protocol, if it becomes available. It is also dependent on the XML schema and fragment working groups, although this dependency may not be absolute.

The duration of this working group is 28 months from August 1999; the specification work period is expected to be 19 months from August 1999. In January 2001, the duration was extended to end of December 2001.

2. Schedule of Deliverables

The CC/PP Working Group will deliver as follows:

For past information and milestones, see the separate schedule document.

3. Relationship with Other Activities

This work will be undertaken within the framework of the W3C standards (e.g. RDF, HTTP, and XHTML), and in close collaboration with the IETF Content Negotiation working group, the WAP Forum UAPROF drafting committee, the ETSI MExE working group, and representatives from the broadcast TV area. To enable the information exchange, representatives from these groups will be invited to participate as invited experts in the working group.

3.1 Dependencies

Given that this group is intended to work with the standard set defined by the W3C, it will be dependent on the RDF Model and Syntax Specification; the RDF Schema specification, and by extension the XML specifications. It will also have to take accessability issues and internationalisation issues into account.

Groups depending on this work, either for informational input into their own schema development, or as a basis for their own content and preferences structures, are the HTML Working Group, the CSS Working Group, and the SYMM Working Group.

People with disabilities (PWD) accessing the World Wide Web can greatly benefit from a formal mechanism describing their user agent capabilities and preferences. The working group will need to make sure that the set of attributes being communicated to servers, the attribute combination framework and the propagation system present in CC/PP will effectively cover the set of constraints found in PWD environments through liaising with the WAI working groups.

The trust model for exchanging privacy sensitive profile information between a client and a server will be based on P3P. But the way P3P is designed today introduces constraints in the exchange of profile information, which may not work in some environments. The CC/PP working group must liaise with the P3P working group to ensure that the mechanisms for managing privacy policies and preferences and capabilities information work together in a smooth and optimal way.

3.2 Additional Mechanisms for Information Exchange

Since the work in the CC/PP working group will be used in several other groups in the W3C, it is important to establish additional mechanisms for the exchange and flow of information. These can take the following form:

Members of the working group will participate in the information exchange as permanent liaisons to the other working groups.

3.3 Group Home Page

The Working Group will have a home page that records the history of the group, provides access to the archives, meeting minutes, updated schedule of deliverables, membership list, and relevant documents and resources. It will be maintained by the W3C staff contact.

4. Working Group Membership

The level of participation expected of WG members requires that they become experts in the technologies developed by the Working Group; and that they meet the minimum level of participation specified in the W3C Process Document.

The participants in the WG are expected to be experienced in producing specifications. Each W3C Member organization is limited to at most two members of this Working Group, although Members are encouraged to invest more effort in the areas covered by the WG.

Members of the working group must produce deliverables as agreed by the working group, and attend face-to-face meetings as scheduled by the working group chair at the request of the working group.

Members in the working group will also have to set aside time to work as liaison to other groups in the W3C. This means that working group members should have not only technical skills.  

The W3C Member companies participating in the WG are also expected to implement the technologies developed as part of their commitment to participate in the WG, either as software or in the shape of an information service using these technologies.

4.1 Invited Experts

This work will be undertaken in close collaboration with the IETF Media Features Registration working group, the WAP Forum UAPROF drafting committee, the ETSI MExE group, and representatives from the broadcast TV area. To enable the information exchange, representatives from these groups may be invited to participate as invited experts in the working group.

The Invited Experts will be required to comply with the W3C Invited Experts mechanism, as described in the W3C Process. In addition, they will be required to comply with this charter, specifically sections 6 and 7.

In cases where there is an overlap of membership between the groups we intend to invite and the W3C (e.g. in the WAP Forum UAPROF Drafting Committee), the preference is that W3C Members join the Working Group as full members, and represent the Working Group in the relevant forum.

5. Meetings and Coordination

Members of the WG are expected to attend face-to-face meetings, as well as participate in the e-mail lists and telephone conferences that are organised for and by the WG.

The main coordination mechanism for the working group will be e-mail, with bi-weekly telephone conferences. The WG will also maintain an IRC channel on the W3C server for its internal use. It will also have quarterly face-to-face meetings, or more frequent as scheduled by the working group chair at the request of the working group. In the interest of minimizing travel costs, these will be co-allocated with other events in which members are expected to participate, such as IETF meetings, WAP Forum meetings, and conferences in the field.

The W3C Process defines the internal communications in the working group and between the working group and the interest group and coordination group.

5.1 Minutes

Minutes of WG meetings shall be reported as required by the W3C Process. Minutes are required to show members present, the results of votes (as described in the W3C Process Document), and significant action items; further information is at the discretion of the chair, but it is expected that the minutes be summaries of discussions. Minutes from meetings and telephone conferences shall be published within three days of the meeting.

Minutes will be published on the interest group e-mail list. If applicable, a log of the IRC channel will also be made available in the same fashion.

5.2 Interest Group

The working group will use the Mobile Access Interest Group as its primary interest group, to serve as a discussion forum for the discussion of issues related to the work. Discussions related to push and broadcast television may be conducted within the TV and Web Interest Group.

5.3 Coordination Group

Since there are dependencies on its work in several of the working groups reporting to it, this working group will report to the Hypertext Coordination Group. The staff contact or chair of the working group will participate in the Hypertext Coordination Group.

6. Intellectual Property Rights

W3C promotes an open working environment. Whenever possible, technical decisions should be made unencumbered by intellectual property right (IPR) claims. W3C's policy for intellectual property is set out in section 2.2 of the W3C Process Document.

Members of the Working Group are expected to disclose any intellectual property they have in the area. This WG will work on a royalty-free basis, as defined in the W3C Current Patent Practice document. The Working Group is thus obliged to produce a specification which relies only on intellectual property available on a royalty-free basis.

If it proves impossible to produce specifications implementable on a royalty-free basis, then a Patent Advisory Group will be launched as described in the W3C Current Patent Practice document.

Members disclose patent and other IPR claims by sending email to, an archived mailing list that is readable by Members and the W3C Team. Members must disclose all IPR claims to this mailing list but they may also copy other recipients. IPR disclosures are expected to be made public.