Mobile content heuristics

A few observations about the FPWD of the CT Guidelines:

In section 4.1.2 of the FPWD of the CT Guidelines, there is no mention
of examination of URLs to determine whether or not to transform.  I'm
mainly thinking of URLs that can be identified as mobile.  Examples
include:

m.*
mobile.*
wap.*
*.mobi
<domain>/m/*
<domain/mobile/*

Probably a CT proxy wants to perform no or minimal transformation on
sites with URLs matching one of these patterns.  Do we want to say
anything about that in this section?  (I think we discussed this topic
at one point, but I can't remember whether we decided specifically not
to say anything about this in the guidelines, or whether it just kind of
fell through the cracks.)

In section 4.4, heuristic examples are given for determining whether a
CT proxy should transform.  The second heuristic mentions content type
and doc type.  Francois has said he plans to put an item on the agenda
for next week to discuss whether we should be more specific about what
content types should or shouldn't be transformed.  We could also say
more about doc types.  For example, the following doc types are usually
only used on mobile sites:

<!DOCTYPE html PUBLIC "-//OMA//DTD XHTML Mobile 1.2//EN"
"http://www.openmobilealliance.org/tech/DTD/xhtml-mobile12.dtd">
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.1//EN"
"http://www.wapforum.org/DTD/xhtml-mobile11.dtd">
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN"
"http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">

Regarding the third heuristic in section 4.4, I think it would be
illuminating to the reader to include an example of "<link> elements
specifying alternatives according to presentation media type".  I'm not
sure this phrase will be obvious to anyone not intimately familiar with
HTML/XHTML.  (The example would be something on the order of: <link
rel="alternate" media="handheld" href="www.mobileversion.com" />)

Sean

Received on Thursday, 1 May 2008 22:55:39 UTC