xsl-list
[Top] [All Lists]

Re: [xsl] [XPath 3.0] Can anonymous functions return markup?

2012-12-16 18:47:28
Now, this is a pure XPath way :)   :

<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
 xmlns:xs="http://www.w3.org/2001/XMLSchema";
 xmlns:my="my:my" exclude-result-prefixes="my xs">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:template match="/">
   <xsl:sequence select=
   "let $print := function () as element()
                    {
                       parse-xml('&lt;hello>World&lt;/hello>')/*
                    }
       return ($print())
   "/>
 </xsl:template>
</xsl:stylesheet>


On Sun, Dec 16, 2012 at 3:38 PM, Dimitre Novatchev 
<dnovatchev(_at_)gmail(_dot_)com> wrote:
No, there are no standard XPath ways to create a new node.

But, given a function in the context of the XPath evaluator, this is possible:

<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
 xmlns:xs="http://www.w3.org/2001/XMLSchema";
 xmlns:my="my:my" exclude-result-prefixes="my xs">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:template match="/">
   <xsl:sequence select=
   "let $print := function () as element()
                    {
                       my:element('Hello', (), 'World')
                    }
       return ($print())
   "/>
 </xsl:template>

 <xsl:function name="my:element" as="element()">
  <xsl:param name="pName" as="xs:string"/>
  <xsl:param name="pAttributes" as="attribute()*"/>
  <xsl:param name="pText" as="xs:string?"/>

  <xsl:element name="{$pName}">
   <xsl:sequence select="$pAttributes"/>
   <xsl:sequence select="$pText"/>
  </xsl:element>
 </xsl:function>
</xsl:stylesheet>

produces:

<Hello>World</Hello>

Similarly, the function my:element() can be written in XQuery.


Cheers,

Dimitre

On Sun, Dec 16, 2012 at 2:07 PM, Costello, Roger L. 
<costello(_at_)mitre(_dot_)org> wrote:
Hi Folks,

I want to create an anonymous XPath function that returns markup. For 
example:

         let $print := function ()
                              {
                                  <hello>World</hello>
                              }
         return ($print())

I tried embedding that XPath within an xsl:sequence element:

      <xsl:sequence select="
         let $print := function ()
                              {
                                  <hello>World</hello>
                              }
         return ($print())
         " />

but that produced this error message:

    The value of attribute "select" associated with an element
    type "xsl:sequence" must not contain the '<' character.

So I escaped the '<' characters:

      <xsl:sequence select="
         let $print := function ()
                              {
                                  &lt;hello>World&lt;/hello>
                              }
         return ($print())
         " />

and that produced this error message:

    Unexpected token "<" in path expression

Is it possible to create an anonymous function that returns markup?

If yes, how?

/Roger

--~------------------------------------------------------------------
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>
--~--




-- 
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
To avoid situations in which you might make mistakes may be the
biggest mistake of all
------------------------------------
Quality means doing it right when no one is looking.
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
-------------------------------------
Facts do not cease to exist because they are ignored.
-------------------------------------
Typing monkeys will write all Shakespeare's works in 200yrs.Will they
write all patents, too? :)
-------------------------------------
I finally figured out the only reason to be alive is to enjoy it.

--~------------------------------------------------------------------
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>
--~--