Device Description Repository Core Vocabulary 1d

W3C Working Group Note 24 January 2008

This version:
Latest version:
Previous versions: (
Andrea Trasatti, mTLD Top Level Domain (dotMobi) [Lead Editor]
Jo Rabin, mTLD Top Level Domain (dotMobi)
Rotan Hanrahan, MobileAware


This document describes the Device Description Repository Core Vocabulary for Content Adaptation in the Mobile Web, described in the charter of the Device Descriptions Working Group, as well as the process by which the vocabulary was defined.

Status of this Document

This document is an editors' copy that has no official standing.

This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at

Publication as a Working Draft does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.

This document is the fourth internal draft of a First Public Working Draft of a future Working Group Note. It has been developed by the Device Description Working Group, as part of the W3C Mobile Web Initiative. Please send comments on this document to the Working Group's public email list, a publicly archived mailing list .

This document was produced under the 5 February 2004 W3C Patent Policy. W3C maintains a public list of patent disclosures made in connection with this document; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) with respect to this specification must disclose the information in accordance with section 6 of the W3C Patent Policy.

Table of Contents

1 Introduction
2 Process
    2.1 Questionnaire
    2.2 Assessment
    2.3 Contributions to UWA ontology
3 Properties
    3.1 Vendor
    3.2 Model
    3.3 Version
    3.4 Display Width
    3.5 Display Height
    3.6 Display Color Depth
    3.7 Input Devices
    3.8 Markup Support
    3.9 Stylesheet Support
    3.10 Image Format Support
    3.11 Input Mode Support
    3.12 Cookie Support


A References
B Acknowledgments

1 Introduction

This document identifies properties that are considered essential for adaptation of content in the mobile Web. Its intended use is to define a baseline vocabulary for implementations of the Device Description Repository (DDR). The vocabulary makes reference to the ontology for the Web delivery context which is being developed by the W3C UWA Working Group [UWA-Ontology].

The vocabulary defined in this document is not intended to represent an exhaustive set of properties for content adaptation. DDR Implementations that require additional properties are free to make use of additional vocabularies. The process of creating a new vocabulary can be modeled on the process described in this document. Implementors are encouraged to make use of the UWA ontology to suggest extensions to it.

Implementors of DDR solutions that are intended to support content adaptation for mobile Web-enabled devices should, at a minimum, support the DDR Core Vocabulary as defined in this document.

This document is maintained by the MWI DDWG and arrangements will be made to assign a maintainer after the closure of the DDWG.

2 Process

The DDWG established a lightweight process for accepting and evaluating contributions to the DDR Core Vocabulary, comprising the following:

2.1 Questionnaire

A public questionnaire was launched to request proposals for inclusion in the core vocabulary, with the following data being obtained for each proposal:

  • Description: A brief description of the proposed property.

  • Type: The data type associated with the property.

  • Justification: An argument put forward to justify the property being part of the core vocabulary. This should explain why the proposed property is essential for basic adaptation of typical Web content, in the context of mobile Web-enabled devices.

  • Measurement: A explanation of how this property is evaluated, suggesting where appropriate the units of measurement.

3 Properties

This is a list of the properties in the DDR Core Vocabulary. Data types are as defined in [XSD-Part2].

Namespace ids are tentative

The property identifiers are associated with the namespace and values from the enumerations are associated with

Bindings to the UWA Ontology will be finalized in a later version of the document, those suggested here are for discussion.


Unlike the UWA Ontology, properties of the Core Vocabulary are not bound to particular aspects of the Delivery Context. Use of the term "display" in several property names is intended to refer to any aspect that can display content, or the Delivery Context as a whole, and is not intended specifically to refer to the aspect of "display" or "screen".

A References

Delivery Context Ontology, Rhys Lewis (ed), W3C Editor's Draft 30 November 2007 (See
W3C Glossary of Terms for Device Independence, Rhys Lewis (ed), W3C Working Draft 18 January 2005 (See
XML Schema Part 2: Datatypes Second Edition, Paul V. Biron, Ashok Malhotra (eds.), W3C Recommendation 28 October 2004 (See
Cascading Style Sheets, level 1, Håkon Wium Lie, Bert Bos, W3C Recommendation 17 Dec 1996, revised 11 Jan 1999 (See
Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification, Bert Bos, Tantek Çelik, Ian Hickson, Håkon Wium Lie, W3C Candidate Recommendation 19 July 2007 (See )
Wireless CSS Specification, Open Mobile Alliance, Candidate Version 1.1 – 09 Jun 2004 (See
G I F (tm) Graphics Interchange Format (tm), CompuServe Incorporated, 15 June 1987 (See
GRAPHICS INTERCHANGE FORMAT (sm), Version 89a, CompuServe Incorporated, 1990 (See
Recommendation T.81, 18 September 1992 (See
Portable Network Graphics (PNG) Specification (Second Edition) Information technology — Computer graphics and image processing — Portable Network Graphics (PNG): Functional specification. ISO/IEC 15948:2003 (E), David Duce (ed.), W3C Recommendation 10 November 2003 (See
XHTML Basic, Mark Baker, Masayasu Ishikawa, Shinichi Matsui, Peter Stark, Ted Wugofski, Toshihiko Yamakami, W3C Recommendation 19 December 2000 (See
XHTML Basic 1.1, Shane McCarron, Masayasu Ishikawa et al., 13 July 2007 (See
XHTML Mobile Profile, Open Mobile Alliance, 29 October 2001 (See

B Acknowledgments

The editors acknowledge the contributions of members of the DDWG.

The editors acknowledge contributors to the Vocabulary Submission Process, namely:

Do we have a list of people who contributed? Other than the above and Andrea?