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.
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2.3 Contributions to UWA ontology
2.4 Property Relationship to Aspects of the Delivery Context
3.1.2 Associated Aspects
3.1.5 Related Properties
3.2.2 Associated Aspects
3.2.5 Related Properties
3.3.2 Associated Aspects
3.3.5 Related Properties
3.4 Display Width
3.4.2 Associated Aspects
3.4.6 Related Properties
3.5 Display Height
3.5.2 Associated Aspects
3.5.6 Related Properties
3.6 Display Color Depth
3.6.2 Associated Aspects
3.7 Input Devices
3.7.2 Associated Aspects
3.8 Markup Support
3.8.2 Associated Aspects
3.9 Stylesheet Support
3.9.2 Associated Aspects
3.10 Image Format Support
3.10.2 Associated Aspects
3.11 Input Mode Support
3.11.2 Associated Aspects
3.12 Cookie Support
3.12.2 Associated Aspects
3.13 Script Support
3.13.2 Associated Aspects
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.
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.
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.
The group voted on each proposed property. Those properties that were rejected were further assessed for the possibility of being useful in other domains, and where identified, external groups were informed of these properties so that they may consider developing their own vocabularies.
Properties that were deemed appropriate to the DDR Core Vocabulary required appropriate semantics to be defined in the UWA ontology. The DDWG held regular meetings with UWA and kept the UWA informed about the needs of the Vocabulary. The UWA in turn helped to refine the DDWG's understanding of the proposed properties and their representation. The conclusion is a set of properties in the DDR Core Vocabulary relate to semantics in the UWA ontology.
It is anticipated that a cross reference from the UWA Ontology to this vocabulary will be produced. However, the UWA Ontology is at an earlier stage of publication than this note at the time of publication of this note.
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, 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. Work on aspects of the delivery context continues,
however, for the purposes of this vocabulary two specific aspects are
identified. Use of the aspects
serves to disambiguate the usage of properties such as
Implementations and other vocabularies may define other values for aspects.
This document identifies the relationship between its properties and the two aspects of the Delivery Context defined here. This does not constrain the generality of applying those properties to other aspects.
This is a list of the properties in the DDR Core Vocabulary. Data types are as defined in [XSD-Part2]. Refer to [DDR-API] for allowable identifier syntax, for allowable value data types and how to represent enumerations in vocabularies that are to be used with the DDR-API.
Namespace ids are tentative
The property identifiers are associated with the namespace
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.
The total number of addressable pixels in the horizontal direction of a rectangular display when held in its default orientation. The property does not apply to displays that are not rectangular or square.
Needed to fit/crop images, text or other width-adaptable content to the screen. Especially useful for LTR and RTL content, where vertical scrolling would be the norm but horizontal scrolling is not desirable. Identified as an important property by the DDWG in its Top N finding. Present in UAProf. Present (and used) in existing adaptation solutions.
The total number of addressable pixels in the vertical direction of a rectangular display when held in its default orientation. The property does not apply to displays that are not rectangular or square.
Needed to fit/crop images, text or other width-adaptable content to the screen. Especially useful for LTR and RTL content, where vertical scrolling would be the norm but horizontal scrolling is not desirable. Identified as an important property by the DDWG in its Top N finding. Present in UAProf. Present (and used) in existing adaptation solutions. Needed if the screen orientation is rotated 90 degrees, in which case this property would represent the width of the rotated screen.
This property described which input devices are available to the user. Normally most mobile devices such as mobile phones will have a keypad, it is common, though, to have a rocker, a stylus and a touch screen in PDAs, tablets and so on.
|keypad||classic 12 button mobile phone keypad|
|touchScreen||touch screen that allows pointing to an area on the screen|
|stylus||a stylus normally works in combination with a touch screen, the stylus provides higher precision|
|trackball||a little sphere that acts like a trackball mouse|
|clickWheel||a 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|
|xhtmlBasic10||XHTML Basic 1.0||[XHTMLBasic10]|
|xhtmlBasic11||XHTML Basic 1.1||[XHTMLBasic11]|
|css10||CSS Level 1||[CSS10]|
|css21||CSS Level 2 Revision 1||[CSS21]|
|useFormatAttribute||Use the ||[OpenWave-Format-Attribute]|
|useWCSS||Use the WCSS ||[WCSS]|
|useInputmodeAttribute||Use the ||[XHTMLBasic11]|
A web server sets a cookie in an HTTP Response. The mobile web browser makes a subsequent HTTP request. If the browser supports cookies the HTTP request should contain the cookie previously set by the web server.
|ecmascript-MP||Supports ECMAScript Mobile Profile||[ECMAScript-MP]|