Scalable Vector Graphics (SVG) Working Group Charter
The mission of the Scalable Vector Graphics (SVG) Working Group is to develop and maintain SVG.
|Start date||22 March 2019|
|End date||31 March 2021||Charter extension||See Change History.|
|Chairs||Dirk Schulze, Adobe|
|Team Contacts||Philippe Le Hégaret (0.01 FTE)|
Teleconferences: topic-specific calls may
be held as needed.
Face-to-face: we will meet during the W3C's annual Technical Plenary week; additional face-to-face meetings may be scheduled by consent of the participants, usually no more than 3 per year.
Scalable Vector Graphics (SVG) is a language that allows authors and users to describe graphics in a way which is scalable to different device resolutions, acessible, and animatable.
The SVG WG develops the SVG specifications. They consist of the following, somewhat independent technologies, all of which are in scope for the SVG Working Group:
- A syntax for retained-model structured graphics. Both XML and HTML5 syntaxes are suported. Styling characteristics are CSS properties, expressed as stylesheets or as presentation attributes.
- A rendering model which describes how the elements of SVG produce a graphical representation
- An Object Model, a set of standard APIs, to which libraries can be written for manipulating dynamic and responsive graphics.
As a primary focus in this charter period, the group will concentrate on the stabilization and interoperability testing of the core SVG 2 specification. As part of that testing, features which are in the reference draft of SVG2 and which do not meet the stability and interoperability requirements for a Proposed Recommendation may be moved to separate specification modules, work on which would remain in scope, but at a lower priority.
As a secondary focus, the group may address modules for new graphical features for SVG, once there is broad consensus on adding each such feature to the Web Platform. The SVG Community Group (and also any other fora, such as WICG) will incubate new proposals. Once an incubated proposal is implemented and available (in nightly or testing builds) in at least one major browser, and has support from other SVG implementers, it may be adopted by the SVG Working Group. A requirements document will be used to collect together these features.
Out of Scope
The following features are out of scope, and will not be addressed by this Working group.
- changes to the HTML parsing algorithm
Each specification should contain a section detailing all known security and privacy implications for implementers, Web authors, and end users.
There should be testing plans for each specification, starting from the earliest drafts.
Each specification should contain a section on accessibility that describes the benefits and impacts, including ways specification features can be used to address them, and recommendations for maximising accessibility in implementations.
Modules that reach W3C Recommendation, are considered successful when all of the following are present:
- Production of stable documents addressing the work items listed in the Deliverables section.
- Test suites for each module with conformance criteria.
- Availability of multiple, independent, interoperable implementations of each feature with conformance criteria in each deliverable; as demonstrated by an implementation report (summarizing implementation status against the relevant test suite) for each testable class of product, including user agents.
- Deployment on multiple types of platform.
- User community and industry adoption of the group deliverables.
More detailed milestones and updated publication schedules are available on the group publication status page.
Draft state indicates the state of the deliverable at the time of the charter approval. Expected completion indicates when the deliverable is projected to become a Recommendation, or otherwise reach a stable state.
The SVG WG will follow a test as you commit approach to specification development:
All normative spec changes are generally expected to have a corresponding pull request in web-platform-tests, either in the form of new tests or modifications to existing tests, or must include the rationale for why test updates are not required for the proposed update.
Typically, both pull requests (spec updates and tests) will be merged at the same time. If a pull request for the specification is approved but the other needs more work, add the 'needs tests' label or, in web-platform-tests, the 'status:needs-spec-decision' label. Note that a test change that contradicts the specification should not be merged before the corresponding specification change.
If testing is not practical due to web-platforms-tests limitations, please explain why and if appropriate file an issue with the 'type:untestable' label to follow up later.
The Working Group will deliver the following W3C normative specifications:
- Scalable Vector Graphics (SVG) 2
This specification defines the core SVG language, as currently implemented in Web browsers. It includes a definition of how ARIA is used in SVG. This specification updates SVG 1.1 to add non-XML parsing (as defined by HTML), removes the XLink namespace, and makes many small improvements in clarity and precision in the specification.
Draft state: Candidate Recommendation
Expected completion: Q4 2019
This specification defines the mapping between (non-ARIA) SVG features and OS platform accessibility application programming interfaces.
Draft state: Working Draft
Expected completion: Q4 2019
- Native SVG
This specification defines Native SVG, for rendering environments which need a vector image format without interactivity or scripting. It originated as a subset of SVG for use within OpenType fonts; the expressiveness of the language is limited and simplified to be appropriate for environments in which font processing and text layout occurs.
Draft state: Adopted from ISO/IEC SC29 WG11
Expected completion: Q1 2020
- Test suite and implementation report for the SVG2 specification, concentrating on changes relative to SVG 1.1 Second Edition
- Use case and requirement documents;
- Primer or Best Practice documents to support web developers when designing applications.
Other non-normative documents may be created, subject to available time, such as:
- Mar 2019: First teleconference
- Apr 2019: Test coverage analysis for SVG2
- Jul 2019: CR of SVG-AAM
- Oct 2019: Proposed Rec, SVG2
- Jan 2020: W3C Recommendation, SVG2
For all specifications, this Working Group will seek horizontal review for accessibility, internationalization, performance, privacy, and security with the relevant Working and Interest Groups, and with the TAG. Invitation for review must be issued during each major standards-track document transition, including FPWD and at least 3 months before CR, and should be issued when major changes occur in a specification.
Additional technical coordination with the following Groups will be made, per the W3C Process Document:
- CSS Working Group
- Coordinate on integration of SVG features and properties into CSS.
- Accessible Rich Internet Applications (ARIA) Working Group
Coordinate on SVG and graphics-related ARIA deliverables. In particular, members of the SVG WG are strongly encouraged to also join the ARIA WG to enable timely progress on the following ARIA deliverables related to SVG:
- Accessible Platform Architectures Working Group
- Coordinate on accessible SVG.
- Spatial Data on the Web Working Group
- Coordinate on SVG used for geographic and spatial data, such as maps.
- Web Application Security Working Group
- Coordinate on security of SVG.
- Web Platform Working Group
- Coordinate on integration of SVG and HTML, and on compatibility with the Canvas API specifications.
- Publishing Working Group
- Coordinate on reading system and publisher support for SVG.
- SVG Community Group
- This group provides a lightweight venue for proposing, incubating and discussing new SVG features.
To be successful, this Working Group is expected to have 6 or more active participants for its duration, including representatives from the key implementors of this specification, and active Editors and Test Leads for each specification. The Chairs, specification Editors, and Test Leads are expected to contribute half of a working day per week towards the (Working|Interest) Group. There is no minimum requirement for other Participants.
The group encourages questions, comments and issues on its public mailing lists and document repositories, as described in Communication.
The group also welcomes non-Members to contribute technical submissions for consideration upon their agreement to the terms of the W3C Patent Policy.
Technical discussions for this Working Group are conducted in public: the meeting minutes from teleconference and face-to-face meetings will be archived for public review, and technical discussions and issue tracking will be conducted in a manner that can be both read and written to by the general public. Working Drafts and Editor's Drafts of specifications will be developed on a public repository and may permit direct public contribution requests. The meetings themselves are not open to public participation, however.
Information about the group (including details about deliverables, issues, actions, status, participants, and meetings) will be available from the SVG Working Group home page.
Most SVG Working Group teleconferences will focus on discussion of particular specifications, and will be conducted on an as-needed basis.
This group primarily conducts its technical work on GitHub issues. The public is invited to review, discuss and contribute to this work.
The group may use a Member-confidential mailing list for administrative purposes and, at the discretion of the Chairs and members of the group, for member-only discussions in special cases when a participant requests such a discussion.
This group will seek to make decisions through consensus and due process, per the W3C Process Document (section 3.3). Typically, an editor or other participant makes an initial proposal, which is then refined in discussion with members of the group and other reviewers, and consensus emerges with little formal voting being required.
However, if a decision is necessary for timely progress and consensus is not achieved after careful consideration of the range of views presented, the Chairs may call for a group vote and record a decision along with any objections.
To afford asynchronous decisions and organizational deliberation, any resolution (including publication decisions) taken in a face-to-face meeting or teleconference will be considered provisional. A call for consensus (CfC) will be issued for all resolutions (for example, via email and/or web-based survey), with a response period from one week to 10 working days, depending on the chair's evaluation of the group consensus on the issue. If no objections are raised on the mailing list by the end of the response period, the resolution will be considered to have consensus as a resolution of the Working Group.
All decisions made by the group should be considered resolved unless and until new information becomes available or unless reopened at the discretion of the Chairs or the Director.
This charter is written in accordance with the W3C Process Document (Section 3.4, Votes) and includes no voting procedures beyond what the Process Document requires.
This Working Group operates under the W3C Patent Policy (Version of 5 February 2004 updated 1 August 2017). To promote the widest adoption of Web standards, W3C seeks to issue Recommendations that can be implemented, according to this policy, on a Royalty-Free basis. For more information about disclosure obligations for this group, please see the W3C Patent Policy Implementation.
This Working Group will use the W3C Software and Document license for all its deliverables.
About this Charter
This charter has been created according to section 5.2 of the Process Document. In the event of a conflict between this document or the provisions of any charter and the W3C Process, the W3C Process shall take precedence.
The following table lists details of all changes from the initial charter, per the W3C Process Document (section 5.2.3):
|Charter Period||Start Date||End Date||Changes|
|Rechartered||2003-10-07||2004-03-31||Switched to W3C Current Patent Practice|
|Rechartered||2004-12-20||2006-09-30||Switched to W3C Patent Policy|
|Rechartered||2008-04-16||2010-04-30||continue to develop SVG 1.2 and to maintain SVG 1.1|
|Rechartered||2012-03-20||2014-03-31||Contains new deliverables...|
|Rechartered||2014-10-23||2016-10-31||zoom media feature, Motion Path, Accessibility and Web Performance joint work. removes the Graphics API and Tiles and Layering|
|Rechartered||2017-08-02||2018-06-30||Restricted to Core SVG 2 and SVG Accessibility API Mappings. New features only after.|
|Rechartered (this charter)||2019-03-22||2021-03-31||Add Native SVG deliverable, focus on SVG2 testing and consider incubated new features.|