Device Description Repository Core Vocabulary 1j

W3C Working Group Note 13 April 2008

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Latest version:
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Jo Rabin, mTLD Top Level Domain (dotMobi)
Andrea Trasatti, 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 tenth 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 W3CMobile 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
3 Vocabulary, Property and Aspect
    3.1 Aspects of the Core Vocabulary
        3.1.1 device
        3.1.2 webBrowser
    3.2 Property Names and Property Value Types
4 Properties
    4.1 Vendor
        4.1.1 ID
        4.1.2 Associated Aspects
        4.1.3 Description
        4.1.4 Type
        4.1.5 Related Properties
        4.1.6 Note
    4.2 Model
        4.2.1 ID
        4.2.2 Associated Aspects
        4.2.3 Description
        4.2.4 Type
        4.2.5 Related Properties
        4.2.6 Note
    4.3 Version
        4.3.1 ID
        4.3.2 Associated Aspects
        4.3.3 Description
        4.3.4 Type
        4.3.5 Related Properties
        4.3.6 Note
    4.4 Display Width
        4.4.1 ID
        4.4.2 Associated Aspects
        4.4.3 Description
        4.4.4 Measurement
        4.4.5 Type
        4.4.6 Related Properties
        4.4.7 Note
    4.5 Display Height
        4.5.1 ID
        4.5.2 Associated Aspects
        4.5.3 Description
        4.5.4 Measurement
        4.5.5 Type
        4.5.6 Related Properties
        4.5.7 Note
    4.6 Display Color Depth
        4.6.1 ID
        4.6.2 Associated Aspects
        4.6.3 Description
        4.6.4 Measurement
        4.6.5 Type
        4.6.6 Note
    4.7 Input Devices
        4.7.1 ID
        4.7.2 Associated Aspects
        4.7.3 Description
        4.7.4 Measurement
        4.7.5 Type
        4.7.6 Note
    4.8 Markup Support
        4.8.1 ID
        4.8.2 Associated Aspects
        4.8.3 Description
        4.8.4 Measurement
        4.8.5 Type
        4.8.6 Note
    4.9 Stylesheet Support
        4.9.1 ID
        4.9.2 Associated Aspects
        4.9.3 Description
        4.9.4 Measurement
        4.9.5 Type
        4.9.6 Note
    4.10 Image Format Support
        4.10.1 ID
        4.10.2 Associated Aspects
        4.10.3 Description
        4.10.4 Measurement
        4.10.5 Type
        4.10.6 Note
    4.11 Input Mode Support
        4.11.1 ID
        4.11.2 Associated Aspects
        4.11.3 Description
        4.11.4 Measurement
        4.11.5 Type
        4.11.6 Note
    4.12 Cookie Support
        4.12.1 ID
        4.12.2 Associated Aspects
        4.12.3 Description
        4.12.4 Measurement
        4.12.5 Type
        4.12.6 Note
    4.13 Script Support
        4.13.1 ID
        4.13.2 Associated Aspects
        4.13.3 Description
        4.13.4 Measurement
        4.13.5 Type


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 Device Description Repository (DDR) implementations.

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 [UWA-Ontology] to suggest extensions to it.

Implementers 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 Vocabulary, Property and Aspect

The DDWG's work on modelling the Delivery Context has highlighted the desirability of identifying components of actual Delivery Contexts and classifying their types.

Components of the Delivery Context are, typically, a device, a user agent, a network connection, and possibly one or more proxies. The notion of "Aspect" captures the type of such components, and allows Properties of vocabularies to refer to specific Aspects of the Delivery Context, or to the Delivery Context as a whole.

The terms "Vocabulary", "Property" and "Aspect" are defined in [DDR-Simple-API], under Section 3. Vocabularies.

3.2 Property Names and Property Value Types

Refer to [DDR-Simple-API]Section 3. Vocabularies for allowable identifier syntax, for allowable value data types and how to represent enumerations in vocabularies that are to be used with the DDR Simple API.

The Property identifiers in this Vocabulary are associated with the namespace This namespace will change if the Core Vocabulary is updated.

The enumerations described in this document contain initial values that should be supported by all implementations of the Core Vocabulary and which may be supplemented by further DDR specific values.

4 Properties

This is a list of the Properties in the DDR Core Vocabulary.

The Default Aspect for the Properties of the Core Vocabulary is device where a Property applies to more than one Aspect.

4.7 Input Devices

4.7.5 Type

Enumeration of values as follows (or other values supported by individual DDRs:

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

A References

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 )
Device Description Repository Simple API, Jo Rabin, José Manuel Cantera Fonseca, Rotan Hanrahan, Ignacio Marín (eds.), W3C Working Draft, 4 April 2008 (See
W3C Glossary of Terms for Device Independence, Rhys Lewis (ed), W3C Working Draft 18 January 2005 (See
ECMAScript Mobile Profile, A Wireless Markup Scripting Language, Version 1.0, 20 Oct 2006, MOA-WAP-ESMP-V1_0-20061020-A (Zipped MS Word) (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
XHTML-MP Style Guide Chapter 5 - Forms: Collecting User Data (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
The "Top N" properties. A finding of the DDWG, recorded in the DDWG wiki, 28 February 2007. (See
User Agent Profile (zip/MS Word) (See
Delivery Context Ontology, Rhys Lewis (ed), W3C Working Draft 21 December 2007 (See
Wireless CSS Specification, Open Mobile Alliance, Candidate Version 1.1 – 09 Jun 2004 (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 contributors to the Core Vocabulary, namely: