W3C home > Mailing lists > Public > public-webplatform@w3.org > July 2013

Re: CSS values and units

From: Lea Verou <lea@w3.org>
Date: Tue, 30 Jul 2013 21:17:54 +0300
Cc: public-webplatform@w3.org
Message-Id: <1DCFFF4A-11E3-48AA-B13B-AF17634CE81C@w3.org>
To: Eliezer Bernart <eliezerbernart@gmail.com>
Hi Eliezer,

Thanks for spending so much time researching this issue and writing this!

In general I agree, but I have a few comments:

- The proposed URL structure is needlessly deep. For example, for frequency you'd end up with:
   docs.webplatform.org/wiki/css/values/other/frequency. This is not guessable and I’d rather have guessable URLs where people who know the general structure would just type them in. 
- What does css/values/modules even mean? The fact that some data types are more complex and defined elsewhere does not matter for whoever is reading the docs, they should still be under values/. That’s why we have the Related specifications field.
- In general, I think we should keep the URL structure shallow. css/values/[type] is already deep. We don't need more levels.
- notations shouldn't be under values/, we have a separate css/functions page type, which is easier to guess too. I also think separate functions should have separate pages.

Cheers,
Lea

Lea Verou
W3C developer relations
http://w3.org/people/all#leahttp://lea.verou.me ✿ @leaverou






On Jul 27, 2013, at 01:25, Eliezer Bernart <eliezerbernart@gmail.com> wrote:

> Hello everyone,
> 
> Some time ago Lea made an observation about duplicate pages, mostly of
> them about CSS data types, in that occasion Doug and I updated the
> css/units and css/data_types pages making a little bit more clear and
> organized. [0]
> 
> This week on IRC channel, Julee and I talked again about this subject,
> and how we all are seeing on the mailing list a lot of questions about
> data types and units organization. Starting from W3C documentation
> that already exists, we elaborated a structure to discuss the best
> model inside Webplatform docs for that information.
> 
> Right now the pages that point to these contents are (some of them
> created by me and Doug in the last update):
> 
> + Data Types = http://docs.webplatform.org/wiki/css/data_types
>       - Text values = /css/data_types/text
>       - Color units = /css/data_types/color
>       - Length units = /css/data_types/length
>       - Angle units = /css/data_types/angle
>       - Numeric units = /css/data_types/numeric
>       - Resolution units = /css/data_types/resolution
>       - Time units = /css/data_types/time
>       - Frequency units = /css/data_types/frequency
> 
> + Units = http://docs.webplatform.org/wiki/css/units
> 
> 
> Based on CSS Values and Units[1] and Syntax and basic data types[2],
> the structure proposed is:
> 
> /css/values
>        |_ /textual
>                    |_ /keywords
>                                |_ css-wide keywords
>                                |_ author-defined identifiers
>                    |_ /string
>                    |_ /url
>        |_ /numeric
>                    |_ /integer
>                    |_ /number
>                    |_ /percentage
>                                |_ %
>        |_ /length
>                    |_ absolute
>                                |_ cm, mm, in, pt, pc, px
>                    |_ relative
>                                |_ em, ex, ch, rem
>                                |_ vw, vh, vmin, vmax
>        |_ /others
>                    |_ /angle
>                                |_ deg, grad, rad, turn
>                    |_ /frequency
>                                |_ Hz, kHz
>                    |_ /resolution
>                                |_ dpi, dpcm, dppx
>                    |_ /time
>                                |_ s, ms
>        |_ /modules
>                    |_ color [3]
>                                |_ colors_by_hue
>                                |_ colors_by_name
>                                |_ colors_by_saturation
>                                |_ user-defined_system_colors
>                    |_ image [4]
>                    |_ position [5]
>        |_ /notations
>                    |_ attr
>                    |_ calc
>                    |_ counter
>                    |_ toggle
> 
> (New pages are represented by '/' before the name)
> 
> In the modules node there are the data types that are defined in other
> specifications, so, should we can just put those at the top level
> after |_/css (i. e.: color, position) or do you think there's
> information that would live on a modules page, and then these data
> types live under modules?
> 
> It's important remember that the values under notation's node
> represent complex data types, in module's node the ones which have
> information defined in other pages, and the others nodes are composed
> by the primitive values.
> 
> About the units page [6], I think that is important keep in a page all
> the possible values, with a link to the data type that each one
> represents. These unit pages would live under their related data type.
> I believe that the actual structure is perfect, what do you think?
> 
> Then there are data types on SVG. There is some differences to data
> types on CSS, so probably these others informations should be at
> /svg/[data_type], following some structure in the same way as CSS,
> just so we do not mix up the things.
> 
> About the pages' content, themselves, there are some things missing:
> how-to examples, some better descriptions, some units. But let's work
> on the structure first.
> 
> Thanks for the attention. All feedback and opinions will be welcome.
> This is a really important point that needed to be defined.
> 
> [0] = http://lists.w3.org/Archives/Public/public-webplatform/2013Jun/0055.html
> [1] = http://www.w3.org/TR/css3-values/
> [2] = http://www.w3.org/TR/CSS2/syndata.html#values
> [3] = http://docs.webplatform.org/wiki/css/color
> [4] = http://www.w3.org/TR/css3-images/
> [5] = http://www.w3.org/TR/css3-background/#the-background-position
> [6] = http://docs.webplatform.org/wiki/css/units
> 
> Eliezer
> 
> @eliezerbernart
> eliezerb
> 
> 
Received on Tuesday, 30 July 2013 18:31:31 UTC

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