Device Description Repository Core Vocabulary

W3C Working Draft 18 December 2007

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


This document describes the Device Description Repository Core Vocabulary for Content Adaptation 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 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 http://www.w3.org/TR/.

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 identifies key device properties that may be represented in an initial instance of a device description repository that supports content adaptation for mobile devices. The identification of these properties has been informed by previous work of the DDWG as well as input from other W3C groups (in particular the Mobile Web Initiative Best Practice Working Group and the Ubiquitous Web Applications Working Group) and external contributors.

This is the First Public Working Draft of a document that is expected to become a 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 public-ddwg@w3.org, a publicly archived mailing list .

This document was produced by a group operating under the 5 February 2004 W3C Patent Policy. This document is informative only. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; 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) 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
        3.1.1 Description
        3.1.2 Type
        3.1.3 Related Properties
        3.1.4 Ontology Links
        3.1.5 Note
    3.2 model
        3.2.1 Description
        3.2.2 Type
        3.2.3 Related Properties
        3.2.4 Ontology Links
        3.2.5 Note
    3.3 version
        3.3.1 Description
        3.3.2 Type
        3.3.3 Related Properties
        3.3.4 Ontology Links
        3.3.5 Note
    3.4 displayWidth
        3.4.1 Description
        3.4.2 Measurement
        3.4.3 Type
        3.4.4 Related Properties
        3.4.5 Ontology Links
        3.4.6 Note
    3.5 displayHeight
        3.5.1 Description
        3.5.2 Measurement
        3.5.3 Type
        3.5.4 Related Properties
        3.5.5 Ontology Links
        3.5.6 Note
    3.6 displayColorDepth
        3.6.1 Description
        3.6.2 Measurement
        3.6.3 Type
        3.6.4 Related Properties
        3.6.5 Ontology Links
        3.6.6 Note
    3.7 inputDevices
        3.7.1 Description
        3.7.2 Measurement
        3.7.3 Type
        3.7.4 Related Properties
        3.7.5 Ontology Links
        3.7.6 Note
    3.8 markupSupport
        3.8.1 Description
        3.8.2 Measurement
        3.8.3 Type
        3.8.4 Related Properties
        3.8.5 Ontology Links
        3.8.6 Note
    3.9 stylesheetSupport
        3.9.1 Description
        3.9.2 Measurement
        3.9.3 Type
        3.9.4 Related Properties
        3.9.5 Ontology Links
        3.9.6 Note
    3.10 imageFormatSupport
        3.10.1 Description
        3.10.2 Measurement
        3.10.3 Type
        3.10.4 Related Properties
        3.10.5 Ontology Links
        3.10.6 Note
    3.11 inputModeSupport
        3.11.1 Description
        3.11.2 Measurement
        3.11.3 Type
        3.11.4 Related Properties
        3.11.5 Ontology Links
        3.11.6 Note
    3.12 cookieSupport
        3.12.1 Description
        3.12.2 Measurement
        3.12.3 Type
        3.12.4 Related Properties
        3.12.5 Ontology Links
        3.12.6 Note


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 UWA ontology for the Web delivery context [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 modelled on the process described in this document. Implementors are encouraged to make use of the UWA ontology. Where necessary, the ontology can be extended.

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].

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".

3.7 inputDevices

3.7.3 Type

Enumeration of possible values as follows:

keypadclassic 12 button mobile phone keypad
touchScreentouch screen that allows pointing to an area on the screen
stylusa stylus normally works in combination with a touch screen, the stylus provides higher precision
trackball a little sphere that acts like a trackball mouse
clickWheela wheel that is normally placed either below the screen or on the side of the device that lets the user quickly move up and down and click on link or items on the screen
otherextended values as defined by individual DDRs

A References

Delivery Context Ontology, Rhys Lewis (ed), W3C Editor's Draft 30 November 2007 (See http://www.w3.org/2007/uwa/editors-drafts/DeliveryContextOntology/2007-11-30/DCOntology.html)
W3C Glossary of Terms for Device Independence, Rhys Lewis (ed), W3C Working Draft 18 January 2005 (See http://www.w3.org/TR/di-gloss/)
XML Schema Part 2: Datatypes Second Edition, Paul V. Biron, Ashok Malhotra (eds.), W3C Recommendation 28 October 2004 (See http://www.w3.org/TR/xmlschema-2/)
Cascading Style Sheets, level 1, Håkon Wium Lie, Bert Bos, W3C Recommendation 17 Dec 1996, revised 11 Jan 1999 (See http://www.w3.org/TR/REC-CSS1)
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 http://www.w3.org/TR/CSS21 )
Wireless CSS Specification, Open Mobile Alliance, Candidate Version 1.1 – 09 Jun 2004 (See http://www.openmobilealliance.org/release_program/docs/Browsing/V2_3-20050118-C/OMA-WAP-WCSS-V1_1-20040609-C.pdf)
G I F (tm) Graphics Interchange Format (tm), CompuServe Incorporated, 15 June 1987 (See http://www.w3.org/Graphics/GIF/spec-gif87.txt)
GRAPHICS INTERCHANGE FORMAT (sm), Version 89a, CompuServe Incorporated, 1990 (See http://www.w3.org/Graphics/GIF/spec-gif89a.txt)
Recommendation T.81, 18 September 1992 (See http://www.w3.org/Graphics/JPEG/itu-t81.pdf)
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 http://www.w3.org/TR/PNG/)
XHTML Basic, Mark Baker, Masayasu Ishikawa, Shinichi Matsui, Peter Stark, Ted Wugofski, Toshihiko Yamakami, W3C Recommendation 19 December 2000 (See http://www.w3.org/TR/2006/WD-xhtml-basic-20060705/)
XHTML Basic 1.1, Shane McCarron, Masayasu Ishikawa et al., 13 July 2007 (See http://www.w3.org/TR/2007/CR-xhtml-basic-20070713)
XHTML Mobile Profile, Open Mobile Alliance, 29 October 2001 (See http://www.openmobilealliance.org/tech/affiliates/wap/wap-277-xhtmlmp-20011029-a.pdf)

B Acknowledgments

The editors acknowledge the contributions of members of the DDWG.

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