[Lynx-dev] a little detail on: support for SVG: Scaleable Vector Graphics

[~:'' ありがとうございました。]

a little detail on: support for SVG: Scaleable Vector Graphics

Thomas, Timothy, Paul, Gisle and all the Lynx developers,

there are steps currently underway to improve the accessibility of  
SVG in the wild, a new techniques document, and even an SVG enabled  
screen reader.

All of this effort would be much aided if Lynx displayed the relevant  
suitable content in an SVG file, in addition to the filename.

According to the SVG specification a title with content, should be  
the first element after the <svg> element[1]

Where title is provided, the author may be expected to have  
understood the purpose, and generally this content may be useful to  
people using, Lynx, screenreaders or search engines.

please find attached a link to one very simple testcase [2], and a  
slightly more complex testcase[3] with a brief description.

I am available to comment and provide further testcases, as the  
project develops.

kind regards

Jonathan Chetwynd
Accessibility Consultant on Media Literacy and the Internet

working with Charles Chen of FireVox I proposed the following:
provisionally adapted by me for Lynx

1. Check if the first child is a <title> and it has content, not just  
whitespace, then display it, else display “untitled SVG”[2]

then only for elements that can take "focus" such as anchors, in each  
of the 4 cases in the testcase [3].

1. Check if the first child is a <title>, if so, display it...
and if
2. The child is <a> with an xlink:title attribute: display the  
xlink:title attribute, possibly adding "linking to" between 1 & 2

or

1. Check if The child is <text>: If it has content, display it.
and if
2. The child is <a> with an xlink:title attribute: display the  
xlink:title attribute, possibly adding "linking to" between 1 & 2

Planning for the future.

It is evident that if we wish to engage people who use screenreaders  
or search engines we need to enhance the semantic content of SVG.  
This will require commonly agreed standards, guidelines and a  
techniques document if screenreader developers and SVG authors are to  
understand the requirements.

http://www.w3.org/TR/SVG11/struct.html#DescriptionAndTitleElements
http://upload.wikimedia.org/wikipedia/commons/b/b7/Black-cloud.svg
http://www.peepo.co.uk/temp/focusable.svg