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RE: [xsl] Cannot process a result tree fragment as a node-set under XSLT 1.0 - My alternative don´t function

2008-04-12 12:04:05
It's not always possible to get by without using result tree fragments but
it is possible in this case. And in general, if you can write

<xsl:variable name="x">
  <xsl:when test="condition1">
    <xsl:copy-of select="exp1"/>
  </xsl:when>
  <xsl:otherwise>
    <xsl:copy-of select="exp2"/>
  </xsl:otherwise>
</xsl:variable>

then you can probably replace it with

<xsl:variable name="x" select="exp1[condition1] | exp2[condition2]"/>

which avoids the cost of copying the nodes, and avoids the RTF problem.

Of course an even better solution is to move to XSLT 2.0.

Michael Kay 
http://www.saxonica.com/

-----Original Message-----
From: Alejandro [mailto:alexcontini(_at_)terra(_dot_)es] 
Sent: 12 April 2008 18:50
To: mike(_at_)saxonica(_dot_)com
Cc: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] Cannot process a result tree fragment as a 
node-set under XSLT 1.0 - My alternative don´t function

Hi Michael,

Thank you so much for the quick response.

Michael >>However, it's not clear to me that you need to 
create an RTF in the first place. Why not define $filter as
    <xsl:variable name="filter" select="//RecursoEx1[($option=1 and
F_FIN=$date1 and contains(TITULO,'o')) or ($option=2 and 
F_FIN=$date2)]"/>

I want to count the RecursoEx1 elements:
    <p>Number: <xsl:value-of
select="count(exsl:node-set($filter)/RecursoEx1)"/></p> CORRECT!

I want to iterate over the RecursoEx1 elements:
    <xsl:for-each select="exsl:node-set($filter)/RecursoEx1"> 
CORRECT !

I use xsl:copy-of and exsl:node-set because to error "Cannot 
process a result tree fragment as a node-set under XSLT 1.0" 
if i code :

<xsl:variable name="filtro">
        <xsl:choose>
            <xsl:when test="$option=1">
                <xsl:copy-of
select="//RecursoEx1[F_FIN=$date1]"/></xsl:when>
            <xsl:otherwise>
                <xsl:copy-of
select="//RecursoEx1[F_FIN=$date2]"/></xsl:otherwise>
        </xsl:choose>
    </xsl:variable>

    <p>Number: <xsl:value-of select="$filter"/></p>

    <xsl:for-each select="$filter">
         <p><xsl:value-of select="TITULO"/></p>
    </xsl:for-each>


and i don´t know if exits another posibility. Exists??

The variable "option" is to received from one formulary, but 
there are more and then the "filter" will be dynamic.

How can i do to construct the filter dynamic? For example, i 
receive one varible named "title" from the formulary with the 
value: "John Martin Car Monday" and i like to enumerate the 
RecursoEx1 elements that meet with this
condition: TITLE=John or TITLE=Martin or TITLE=Car or TITLE=Monday.

or title variable is Apple Pencil, ..... then the condition 
will be TITLE=Apple or TITLE=Pencil

i don´t know how may parameters i will receive in advance..

Thanks again Michael,

Alexander


----- Mensaje original -----
De: "Michael Kay" <mike(_at_)saxonica(_dot_)com>
Para: <xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com>
Enviado: sábado, 12 de abril de 2008 14:03
Asunto: RE: [xsl] Cannot process a result tree fragment as a 
node-set under XSLT 1.0 - My alternative don´t function


The node-set returned by the exsl:node-set() function will 
always contain a single (document or root) node. Perhaps you 
wanted its children:
exsl:node-set()/*.

However, it's not clear to me that you need to create an RTF 
in the first place. Why not define $filter as

<xsl:variable name="filter"
   select="//RecursoEx1[($option=1 and F_FIN=$date1 and
contains(TITULO,'o'))
                        or ($option=2 and F_FIN=$date2)]"/>

Note also, that horrible bit of disable-output-escaping can 
be avoided by setting the doctype-system and doctype-public 
attributes on xsl:output.

Michael Kay
http://www.saxonica.com/


-----Original Message-----
From: Alejandro [mailto:alexcontini(_at_)terra(_dot_)es]
Sent: 12 April 2008 13:05
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Cannot process a result tree fragment as a node-set 
under XSLT 1.0 - My alternative don´t function

Hello, i want to recover any records in function of one variable 
(option in this case), and i don´t know to do it. I want to 
print the 
TITULO element the those records.
Can you help me, please?

Cheers,
Alexander


********************************* XML
*************************************

<?xml version="1.0"?>

<List>
<RecursoEx1>
<TITULO>Sara Baras</TITULO>
<F_INICIO>20080125000000</F_INICIO>
<F_FIN>20080211000000</F_FIN>
</RecursoEx1>

<RecursoEx1>
<TITULO>Exposicion de pintura</TITULO> 
<F_INICIO>20080201000000</F_INICIO>
<F_FIN>20080211000000</F_FIN>
</RecursoEx1>

<RecursoEx1>
<TITULO>Inaguracion de ...</TITULO>
<F_INICIO>20080205000000</F_INICIO>
<F_FIN></F_FIN>
</RecursoEx1>

<RecursoEx1>
<TITULO>Clausura de ..</TITULO>
<F_INICIO>20080101000000</F_INICIO>
<F_FIN>20080205000000</F_FIN>
</RecursoEx1>

</List>


********************** XSL **********************

<?xml version="1.0" encoding="ISO-8859-1"?> <xsl:stylesheet 
xmlns:i18n="http://apache.org/cocoon/i18n/2.0";
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:exsl="http://exslt.org/common";
    extension-element-prefixes="exsl" version="1.0">

<xsl:output method="html" media-type="text/html;charset=iso-8859-1"
indent="yes" encoding="ISO-8859-1" omit-xml-declaration="yes" />

<xsl:variable name="date1" select="20080205000000"></xsl:variable>
<xsl:variable name="date2" select="20080211000000"></xsl:variable>
<xsl:variable name="option" select="1"></xsl:variable>

<xsl:template match="/">

<xsl:text disable-output-escaping="yes"><![CDATA[<!DOCTYPE
html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>]]></xsl:text>

<html xmlns="http://www.w3.org/1999/xhtml"; xml:lang="es">

<head>
 <title>Gabinete of Prensa</title>
    <meta http-equiv="Content-Type" content="text/html; 
charset=iso-8859-1"
/>
</head>

<body>

    <xsl:variable name="filter">
        <xsl:choose>
            <xsl:when test="$option=1">
                <xsl:copy-of
select="//RecursoEx1[F_FIN=$date1 and
contains(TITULO,'o')]"/></xsl:when>
            <xsl:otherwise>
                <xsl:copy-of
select="//RecursoEx1[F_FIN=$date2]"/></xsl:otherwise>
        </xsl:choose>
    </xsl:variable>





 <p>Number: <xsl:value-of
select="count(exsl:node-set($filter))"/></p> <!-- DON'T FUNCTION -->

 <xsl:for-each select="exsl:node-set($filter)">
     <p><xsl:value-of
select="exsl:node-set($filter)/TITULO"/></p>      <!--
DON'T FUNCTION -->
</xsl:for-each>

</body>
</html>
</xsl:template>

</xsl:stylesheet>







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