Re: Fw: Personalizations and Media Queries 4

See also the emerging related discussion on the Dpub-ARIA Task Force email list:


Fred Esch writes:
> Want to get this in the list so I can reference it in action-2005.
>      Regards,                                                 
>     Fred Esch                                                 
>  Watson, IBM, W3C                                             
>   Accessibility                                               
>  IBM Watson       Watson Release Management and Quality       
> ----- Forwarded by Fred Esch/Arlington/IBM on 02/08/2016 01:47 PM -----
> From: Florian Rivoal <>
> To: "Siegman, Tzviya - Hoboken" <>
> Cc: Fred Esch/Arlington/IBM@IBMUS, "("
>             <>, Ivan Herman <>, Romain
>             Deltour <>, "Michael Cooper ("
>             <>
> Date: 02/08/2016 02:31 AM
> Subject: Re: Personalizations and Media Queries 4
> Hi,
> I fully support the goal of customization, and of giving means to users to
> express preferences over how content should be styled.
> However, in the general case, media queries are not a tool for that. They
> are a tool to let the author change aspects of their design in response to
> a different environment. It isn't out of question that "the environment"
> could include user preferences, but expressing these at the right
> granularity is a difficult task, and then authors are still free to ignore
> them entirely.
> User style sheets seem generally more suited to let users expressed what
> stylistic changes they want on a page. Historically they have suffered from
> poor to no UI, but as a mechanism, they are appropriate for doing things
> like font size of style changes, switching from black text on white
> background to the reverse or to a sepia style, and many other things ebook
> readers have been offering their users.
> Whether or not they are the actual mechanism used, in most cases user style
> sheets are in line with the behavior authors expect. When someone reading
> an ebook clicks the "sepia" button, they are telling their User Agent what
> to do to the content, not making ignorable requests to the author.
> There are some areas where preference media queries may have a role to
> play, and the CSSWG is interested in looking into these even though they
> have not been prioritized so far. This would be focused on accessibility,
> tying into the OS level controls that already exist. Examples put forward
> by apple have included: preferring reduced animation, preferring using
> shapes rather than colors to draw distinctions between things, or
> preferring reduced transparency.
> The difficulty is that these things need to be fairly abstract (if they
> were not, user style sheets would be more appropriate), yet actionable, and
> at the same time be a sufficiently short list that implementors and authors
> can be expected to care. The most likely path forward here is to work from
> the list of settings that pre-exist in operating systems and standardize
> that.
> --
> Florian RIVOAL
> 取締役、Chief Commercial Officer
> Vivliostyle
>       On Feb 4, 2016, at 03:52, Siegman, Tzviya - Hoboken <
>> wrote:
>       HI Fred,
>       As we discussed in today’s APA meeting [1], personalization is a huge
>       issue for DPUB and could be relevant to your a11y review of Media
>       Queries Level 4 [2]. We have several preliminary use cases [3].
>       Romain Deltour is working on a more formal use case document. I have
>       included him on this note so that he knows what priority these use
>       cases should take.
>       In the current digital publishing world, at least some degree of
>       personalization is an assumption for all users. All reading systems
>       offer the user at least some options for adjusting fonts, font size,
>       background color, line height, and zoom. This has very interesting
>       implications for paged content, reflowable content, and many other
>       implications for CSS. This is not usually an aspect of the CSS for
>       the publication but built into the user agent settings.
>       I have copied Florian Rivoal who is at once one of the editors for
>       Media Queries and an expert in pagination. Aside from information for
>       your review of MQs, we hope to bring these use cases to WAI for
>       practical implementation.
>       Please let us know what we can do to help and if you need more
>       information about the use cases.
>       Best,
>       Tzviya
>       [1]
>       [2]
>       [3]
>       Tzviya Siegman
>       Digital Book Standards & Capabilities Lead
>       Wiley
>       201-748-6884


Janina Sajka, Phone: +1.443.300.2200

Linux Foundation Fellow
Executive Chair, Accessibility Workgroup:

The World Wide Web Consortium (W3C), Web Accessibility Initiative (WAI)
Chair, Accessible Platform Architectures

Received on Tuesday, 9 February 2016 12:02:15 UTC