[css-gcpm] content() function doesn't allow formatting of values

Hi,

suppose simple use-case. There is date of the last modification stored
in a <meta> element using Dublin Core:

<meta name="DCTERMS.modified" content="2001-07-18">

and I want to put this date into the footer but formatted using Czech
locale. There is currently no provision for this.

One way to solve this is to provide additional function called xpath()
that will accept any XPath 2.0 expression and which could be used in a
content property and in places where content() function can be used.
XPath 2.0 already provides date, time and number formatting functions
and operates on document tree. So there will be no need to reinvent
everything from the scratch.

I mean this seriously. If CSS is supposed to fill space where currently
XSL is used more advanced data transformation prior rendering are needed.

Please note that there are already implementations supporting this, for
example:

http://www.oxygenxml.com/doc/ug-editor/concepts/dg-xpath-function.html

http://www.xmlmind.com/xmleditor/_distrib/doc/csssupport/xpath.html

    Jirka

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