[web-annotation] (model) have a note on logical and visual order of text for text quote selector implementations

fsasaki has just created a new issue for 
https://github.com/w3c/web-annotation:

== (model) have a note on logical and visual order of text for text 
quote selector implementations ==
Comment on
https://www.w3.org/TR/2016/WD-annotation-model-20160331/#text-quote-selector
The annotation model specifies for implementations on the DOM level 
how the selector should be generated, see the paragraph starting like 
this:

> When generating the Text Position Selector values, it is recommended
 that implementations built for an environment that supports DOM Level
 3 APIs use the textContent property of top level, user visible Node 
object [DOM-Level-3-Core] of the resource.

A user agent may have issues to implement the proper selection 
functionality on a user interaction level then working with 
bidirectional text. Here it would hep to have a note  saying that the 
text quote selector operatosr on the logical order of characters and 
that the visual order has to be taken into account separately by the 
user agent. See the following material for background information. 
- About logical versus physical order 
https://www.w3.org/International/questions/qa-visual-vs-logical
- About potential issues with selection, to 
http://r12a.github.io/scripts/tutorial/part4#selection 
The material explains the issues.

The comment is not on referencing the two sources; a note itself would
 be useful.

Please view or discuss this issue at 
https://github.com/w3c/web-annotation/issues/210 using your GitHub 
account

Received on Monday, 9 May 2016 12:09:31 UTC