From: Michael
Priestley [mailto:mpriestl@ca.ibm.com]
Sent: Tuesday, May 23, 2006 10:54
AM
To: Grosso, Paul
Cc: dita@lists.oasis-open.org;
Esrig, Bruce (Bruce); Paul Prescod; Robert D Anderson; Su-Laine Yeo
Subject: [SPAM] RE: [dita] Updated
feature 20
Importance: Low
Here's what's currently there:
>Colors
may be entered by name or code. Processor support is recommended for
>the
colors listed in <xref
href=""http://www.w3.org/TR/xsl/slice5.html#section-N8794-Property-Datatypes"
>scope="external"></xref>
Let
me know if this needs to change, and if so, provide the wording.
Michael
Priestley
IBM DITA Architect and Classification Schema PDT Lead
mpriestl@ca.ibm.com
http://dita.xml.org/blog/25
"Grosso, Paul"
<pgrosso@ptc.com>
05/23/2006 10:48 AM
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To
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"Paul Prescod"
<paul.prescod@xmetal.com>, Michael Priestley/Toronto/IBM@IBMCA
|
cc
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<dita@lists.oasis-open.org>,
"Esrig, Bruce \(Bruce\)" <esrig@lucent.com>, "Robert D
Anderson" <robander@us.ibm.com>, "Su-Laine Yeo"
<su-laine.yeo@xmetal.com>
|
Subject
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RE: [dita] Updated feature 20
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You're right, I was responding only to the
"what color names" part.
As far as color code syntax, my previous (and current)
suggestion is to
accept only the #rrggbb syntax (case insensitive) aka "6
digit hex codes"
aka the HTML 3.2 model.
It's true that the XSL spec is a bit unclear here, but at
http://www.w3.org/TR/xsl/slice5.html#section-N7618-Colors
it says that "RGB colors are directly
represented in the expression language
using a hexadecimal notation" and all XSL
implementations of which I am
aware do support the #rrggbb syntax as does CSS, and it is
the most common
one used in practice.
So I suggest we use the 16 color names. I don't care if
we list them or we
reference HTML, XSL, or CSS 1, as long as we don't put
specific RGB values
for them. And I suggest we say that a color can also be
represented using
the 6 digit hex code (#rrggbb, case insensitive) form.
paul
From: Paul Prescod
[mailto:paul.prescod@xmetal.com]
Sent: Tuesday, 2006 May 23 09:27
To: Grosso, Paul; Michael Priestley
Cc: dita@lists.oasis-open.org; Esrig, Bruce (Bruce); Robert D
Anderson; Su-Laine Yeo
Subject: RE: [dita] Updated feature 20
It is still not clear what we mean when we say that we are
going to “use” the XSL reference. Will we or won’t we support
XSL’s three color-function syntaxes?
http://www.w3.org/TR/xsl/slice5.html#expr-color-functions
In addition, I don’t believe that XSL has a notion of
the # hexhexhex syntax. So if we want that, we aren’t really using XSL
syntax, though we might be using XSL color names.
CSS 1 allows basically five syntaxes. Color names, 3-digit
hex codes, 6 digit hex codes, rgb absolute, rgb percentage.
It seems like what we have been informally describing is
actually the HTML 3.2 color model:
http://www.w3.org/TR/REC-html32.html
Are there any known problems with that model that would
prevent us from using it?
From: Grosso, Paul
[mailto:pgrosso@ptc.com]
Sent: Tuesday, May 23, 2006 10:01 AM
To: Michael Priestley; Paul Prescod
Cc: dita@lists.oasis-open.org; Esrig, Bruce (Bruce); Paul Prescod;
Robert D Anderson; Su-Laine Yeo
Subject: RE: [dita] Updated feature 20
Yes, I agree with the XSL (not XSLT) reference.
CSS3 is not yet a Recommendation, and interoperable support
is
only guaranteed for those referenced by XSL and the HTML DTD.
paul
From: Michael
Priestley [mailto:mpriestl@ca.ibm.com]
Sent: Monday, 2006 May 22 22:37
To: Paul Prescod
Cc: dita@lists.oasis-open.org; Esrig, Bruce (Bruce); Paul Prescod;
Robert D Anderson; Su-Laine Yeo
Subject: [dita] Updated feature 20
>
> We proposed to take out the list of colour names in the
> specification. They could be included by reference as suggested by
> Paul Grosso.
>
> On the other hand, the link to the XSLT specification implies that
> DITAVAL processors should support the syntaxes defined here:
>
> http://www.w3.org/TR/xsl/slice5.html#expr-color-functions
>
> We should be explicit about what syntaxes we support. I personally
> would like to know whether XSL will synchronize with SVG and CSS as
> defined here:
>
> http://www.w3.org/TR/css3-color/#svg-color
>
> Somehow we need a clear definition of what syntax the attribute
> supports. It doesn't matter much what the syntax is.
I don't have a decision here. In the absence of input, I am picking the
existing XSLT reference because the list of colors is shorter.