Difference between revisions of "Accessible Graphics"
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How can Inkscape become the ideal tool for creating accessible SVG? | |||
=== | === Background Links === | ||
<!-- dead link, not sure where this was supposed to point | |||
* inkscape [https://sourceforge.net/tracker/index.php?func=detail&aid=993367&group_id=93438&atid=604309 rfe] | * inkscape [https://sourceforge.net/tracker/index.php?func=detail&aid=993367&group_id=93438&atid=604309 rfe] | ||
* a [http://www.peepo.co.uk/pmwiki/pmwiki.php/Main/SVG rant] on SVG and Accessibility given at the latest London SVGUG meeting with plenty of links. some concepts were | --> | ||
*Links to primary [http://www.learningdifferently.com/develop/svg.html documentation] on creating accessible SVG | * a [http://www.peepo.co.uk/pmwiki/pmwiki.php/Main/SVG rant] (dead link) on SVG and Accessibility given at the latest (year?) London SVGUG meeting with plenty of links. some concepts were addressed and alpha proof of concept code developed. | ||
* Links to primary [http://www.learningdifferently.com/develop/svg.html documentation] on creating accessible SVG | |||
* SVG and accessibility (somewhat out of date): [http://www.w3.org/TR/SVG-access/ authoring guidance], [http://www.w3.org/TR/SVG11/access.html SVG 1.1 appendix] | |||
* Work of the W3C Accessibility task force: [http://www.w3.org/WAI/PF/svg-a11y-tf/ work statement], [https://www.w3.org/wiki/SVG_Accessibility wiki] | |||
=== What Inkscape Does Well === | |||
Some accessibility features of SVG Inkscape inherits by default, such as having text stored as machine-readable text. Others require extra effort. | |||
As of 0.91, Inkscape: | |||
* Allows users to set alternative text (<title> and <desc>) for graphics content in the object properties dialog. | |||
* Sets the document-level <title> element if the user has set a title in the metadata | |||
* Supports logical grouping of elements, and allows <title> and <desc> to be set on the group | |||
Recently pushed to the dev branch was a fix so that text-to-path stores the original text content in an aria-label attribute, which will go a long way to preserving the accessibility of that content. | |||
=== Doing Better === | |||
There is currently a {{bug | id = 170340 | name=bug report | status=confirmed}} regarding adding UI support for the core SVG accessibility features. | |||
Two main issues (not yet implemented) are covered by that bug report: | |||
* A document-level title should be required, but it is currently hard to set and there is no prompting for it. | |||
* The language of the text (visible or alternative) needs to be easy to specify with the xml:lang attribute. | |||
Language issues can get rather complex, and have benefits beyond accessibility, so there [[Language_support | is a separate wiki page for them]]. | |||
More advanced issues to consider: | |||
* Ensuring that text elements are preserved in a logical reading order. This will be easier once z-index is supported, for now the aria-flowto attribute could be used to define the reading order. However, there would need to be a user interface for setting the reading order -- the order that elements are added to the graphic may not be the logical reading order. | |||
* Adding WAI-ARIA widget roles for anything that has interactive scripting added to it. | |||
[[Category:Developer Discussion]] | |||
[[Category:Needs Work]] | |||
Latest revision as of 14:27, 23 February 2017
How can Inkscape become the ideal tool for creating accessible SVG?
Background Links
- a rant (dead link) on SVG and Accessibility given at the latest (year?) London SVGUG meeting with plenty of links. some concepts were addressed and alpha proof of concept code developed.
- Links to primary documentation on creating accessible SVG
- SVG and accessibility (somewhat out of date): authoring guidance, SVG 1.1 appendix
- Work of the W3C Accessibility task force: work statement, wiki
What Inkscape Does Well
Some accessibility features of SVG Inkscape inherits by default, such as having text stored as machine-readable text. Others require extra effort.
As of 0.91, Inkscape:
- Allows users to set alternative text (<title> and <desc>) for graphics content in the object properties dialog.
- Sets the document-level <title> element if the user has set a title in the metadata
- Supports logical grouping of elements, and allows <title> and <desc> to be set on the group
Recently pushed to the dev branch was a fix so that text-to-path stores the original text content in an aria-label attribute, which will go a long way to preserving the accessibility of that content.
Doing Better
There is currently a {{#if: bug report | bug report (lp:170340)| lp:170340 }} regarding adding UI support for the core SVG accessibility features.
Two main issues (not yet implemented) are covered by that bug report:
- A document-level title should be required, but it is currently hard to set and there is no prompting for it.
- The language of the text (visible or alternative) needs to be easy to specify with the xml:lang attribute.
Language issues can get rather complex, and have benefits beyond accessibility, so there is a separate wiki page for them.
More advanced issues to consider:
- Ensuring that text elements are preserved in a logical reading order. This will be easier once z-index is supported, for now the aria-flowto attribute could be used to define the reading order. However, there would need to be a user interface for setting the reading order -- the order that elements are added to the graphic may not be the logical reading order.
- Adding WAI-ARIA widget roles for anything that has interactive scripting added to it.