Old technical input for TTML 1.0

For the purpose of review the charter, it would help me to understand
the position of the Group on the following input:

[[
Reference to XML 1.1 are in the text (in Normative section D.1) and not
in the Reference section 

Why UAAG and WCAG are using version 1.0 instead of 2.0 ?


Namespace 1.0 is now at 3rd Edition

How is TTML supposed to be integrated in HTML5 ?

Content model of p is Content: Metadata.class*, Animation.class*,
Inline.class* : I'm surprised by this content model since XML Schema and
DTD cannot enforced it (Text is always mixed)

Why isn't xml:base allowed ?

Why all the examples are putting one attribute per style element ? What
are the added values ?

<region xml:id="r3">
<style tts:extent="128px 66px"/>
<style tts:origin="0px 132px"/>
<style tts:backgroundColor="black"/>
<style tts:color="white"/>
<style tts:displayAlign="before"/>
<style tts:textAlign="start"/>
</region>

In 8.3.6, how are genericFamilyName defined ? in XSL 1.1 or CSS 2.0 only
"serif", "sans-serif", "cursive", "fantasy", and "monospace" are
defined ?

Using c for cell is a very bad idea because it is incompatible with
existing CSS library because of "cm" for centimeter ; CSS units uses
"gd" for grid so it might be better to sync with CSS Values
http://www.w3.org/TR/css3-values/#lengths

In 8.2.12, how does tts:lineHeight work with a value with unit "c" ?

In 8.3.1, <alpha> uses XML Schema "float" definition. But in XML Schema
float allow the value "INF", "-INF", "NaN" and "10e-3" ? It is really
worth the complexity of allowing the XML Schema definition ? It's
probably wiser to use http://www.w3.org/TR/css3-values/#non-negative

In 8.3.2 Colors aren't compatible with CSS colors that are #rgb and not
#rrggbbaa ; It should be aligned with this spec
http://www.w3.org/TR/css3-color/#rgb-color

In 8.2.19 tts:textDecoration are inventing new values (noUnderline,
etcc.)

In short, many values are underdefined, redefined and misleading in many
case and doesn't allow reuse of existing library

This specification should better integrated other W3C specifications
]]

Received on Thursday, 10 May 2012 14:22:01 UTC