In XML Schema, a simple type is either a list type, a union type, or an
atomic type; however, these three kinds of simple type are not recognized
explicitly in the type hierarchy. For XPath, it was necessary to distinguish
atomic types from the other kinds of simple type, so xdt:anyAtomicType was
invented to achieve this.
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: Frans Englich [mailto:frans(_dot_)englich(_at_)telia(_dot_)com]
Sent: 02 July 2005 21:47
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] What's the difference between
xdt:anyAtomicType and xs:anySimpleType?
Hi,
I wonder, what is the difference between the xdt:anyAtomicType and
xs:anySimpleType? It is a type(duh) and hence can code and
definitions depend
on it, but other than that, does it have any "effective" impact?
Why does it exist? If it didn't exist, anySimpleType would
have to derive from
the imaginary "itemType"; is that the reason?
Can the anyAtomicType be considered a "marker interface" for
atomic values,
but that it in practice is an anySimpleType?
In the XML.com article titled "The XPath 2.0 Data Model"[1]
there's a small
hint:
"The Data Model document adds five new types to the 19
primitive types defined
in the Part 2 Recommendation: [...] the xdt:anyAtomicType, an
abstract type
that plugs a newly-discovered architectural hole [...]"
What was the architectural hole(or where can I read about
it), and has it any
relation to my question?
Cheers,
Frans
1.
http://www.xml.com/lpt/a/2005/02/02/xpath2.html
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail:
<mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail: <mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--