This specification defines in general a subset of CSS 2.1 [CSS21] that is to be considered a baseline for interoperability between implementations of CSS on constrained devices (e.g. mobile phones). Its intent is not to produce a profile of CSS incompatible with the complete specification, but rather to ensure that implementations that due to platform limitations cannot support the entire specification implement a common subset that is interoperable not only amongst constrained implementations but also with complete ones. Additionally, this specification aligns itself as much as possible with the OMA Wireless CSS 1.1 [WCSS11] specification. At the same time, OMA is doing alignment work in OMA Wireless CSS 1.2 [WCSS12]. It is aimed at aligning the mandatory compliance items between CSS Mobile Profile 2.0 and OMA Wireless CSS 1.2 [WCSS12].
This profile is obsolete. Please see the latest CSS Snapshot for the specifications that make up CSS.
Status of this documentThis 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 Group Note 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 was produced by the CSS Working Group (part of the Style Activity).
The (archived) public mailing list www-style@w3.org (see instructions) is preferred for discussion of this document. When sending e-mail, please put the text “css-mobile” in the subject, preferably like this: “[css-mobile] …summary of comment…”
This document was produced by a group operating under the 5 February 2004 W3C Patent Policy. 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.
This document is governed by the 1 August 2014 W3C Process Document.
At this time, the CSS Working Group does not envisage further work on this specification and does not plan to propose it as a W3C Recommendation.
Table of ContentsThis document specifies a profile of CSS that is in general based on CSS 2.1 [CSS21], but requires as well new features from CSS 3. In addition the document defines an OPTIONAL feature set, that is suggested to be implemented by more advanced user agents.
2. ConformanceThe key words of descriptive assertions and RFC 2119 terminology. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119].
Since the goal of this specification is to define a baseline interoperability level, user agents MAY accept CSS documents conforming to CSS 2.1 or subsequent revisions of the CSS family of Recommendations.
In order to conform to this specification, user agents, authoring tools, and content MUST conform to the Conformance and Error conditions section of the CSS 2.1 specification [CSS21], with the following modifications.
handheld and all media types MUST be accepted and processed. Other media types MAY be accepted and processed as well.Selectors are defined in the Selectors chapter of the CSS 2.1 specification [CSS21]. The following table identifies which selector constructs MUST be supported amongst those defined by CSS 2.1.
Selector type Example Meaning Conformance Universal selector* Matches any element. REQUIRED Type selectors E Matches any E element. REQUIRED Descendant selectors E F Matches any F element that is a descendant of an E element. REQUIRED Child selectors E > F Matches any F element that is a child of an element E. REQUIRED The link pseudo-classes E:link Matches element E if E is the source anchor of a hyperlink, unvisited by a user. REQUIRED The link pseudo-classes E:visited Matches element E if E is the source anchor of a hyperlink, visited by a user. REQUIRED The dynamic pseudo-classes E:active Matches element E if E is being activated by the user. REQUIRED The dynamic pseudo-classes E:focus Matches element E if E has the focus (accepts keyboard events or other forms of text input). REQUIRED Class selectors .warning Language specific. (In (X)HTML, matches elements whose class attribute contains a token with the same name.) REQUIRED ID selectors #myid Matches any element with an ID equal to "myid". REQUIRED Grouping E1, E2, E3 { ... } Matches a group of elements, which share the same style declarations. REQUIRED 4. At-rules
At-rules are defined in the at-rules section of the CSS 2.1 specification [CSS21]. The following table identifies which at-rule constructs MUST be supported amongst those defined by CSS by setting the at-rule as REQUIRED in the table's last column. Only at-rules that are part of the suggested feature set for advanced user agents are listed here as OPTIONAL.
Rule Definition Conformance @charset Defines character encoding for the style sheet. REQUIRED @import Imports an external style sheet. REQUIRED @media Groups a set of style rules to apply only to one or more particular media.handheld and all media types MUST be accepted and processed. Other media types MAY be accepted and processed as well. REQUIRED @namespace For declaring the default namespace and binding namespaces to namespace prefixes. OPTIONAL 5. Properties
Properties are defined in several chapters of the CSS 2.1 specification [CSS21] and in case of marquee properties in the CSS Marquee Module [CSS3MARQUEE]. The following table identifies which properties MUST be supported amongst those defined by CSS by setting the property as REQUIRED in the table's last column. Only properties that are part of the suggested feature set for advanced user agents are listed here as OPTIONAL. The property syntax is provided (expressed using the same value specifications as CSS 2.1) when it is subsetted from the original. Limitations that apply to a property apply equally to its shorthand alternative.
Informative Notes'Marquee', 'Access Keys' and 'Input'. Those extensions are deprecated in OMA Wireless CSS 1.2 [WCSS12]. The 'Marquee' functionality has been redefined by the marquee properties of the CSS 3 box model [CSS3MARQUEE]A user agent MUST support all value types defined in the Values section of the CSS 2.1 specification [CSS21], with the following exceptions:
The editors wish to thank the authors of the previous version of this document, Ted Wugofski (Openwave), Doug Dominiak (Openwave, formerly Motorola), Peter Stark (Ericsson), and Tapas Roy (Openwave), as well as the authors of the OMA Wireless CSS specifications and the CSS 2.1 specification. Furthermore, the editors want to thank the CDF WG for their participation on this specification.
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