XSLT match question

R

Rainer Herbst

Hi *,

please consider the following problem:
I have a XML document which includes some html elements.
I want to replace only the <div> element:

I specified two templates, one matches everything ("*"),
one matches only the "div". As far as I understand, the most specific
rule should apply, i.e. the div rule if the element is a <div>.

But the div rule is never applied! Where is my mistake?

TIA!
Rainer Herbst


The XML document:
<?xml version="1.0" encoding="UTF-8"?>
<page>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="HTML Tidy, see www.w3.org" name="generator"/>
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"/>
<meta content="index" name="robots"/>
<meta content="Universitaet Potsdam" name="keywords"/>
<meta content="Microsoft FrontPage 4.0" name="GENERATOR"/>
<meta content="FrontPage.Editor.Document" name="ProgId"/>
<link href="http://www.uni-potsdam.de/over/unilogol.ico" rel="shortcut
icon"/>
<title>Homepage der Universität Potsdam</title>
</head>
<body vlink="#808080" link="#336699" bgcolor="#ffffff">
<div>wrong!!!</div>
<p align="center">unterschrift</p>
</body>
</html>
<dir:directory xmlns:dir="http://apache.org/cocoon/directory/2.0"
name="pressemitteilungen" lastModified="1064833858000" date="29.09.03
13:10" size="4096" sort="name" reverse="false" requested="true">
<dir:file name="first.xml" lastModified="1064833858000" date="29.09.03
13:10" size="62"/>
</dir:directory>
</page>


My stylesheet:

<?xml version="1.0" standalone="no"?>

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:dir="http://apache.org/cocoon/directory/2.0" >


<!-- all elements -->
<xsl:template match="*">
<xsl:copy select=".">
<xsl:for-each select="@*">
<xsl:attribute name="{name(.)}">
<xsl:value-of select="."/>
</xsl:attribute>
</xsl:for-each>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>

<xsl:template match="div">
<xsl:for-each
select="/page/dir:directory[@name='pressemitteilungen']/dir:file">
<xsl:value-of select="@name"/>
</xsl:for-each>
</xsl:template>

<xsl:template match="/page">
<xsl:apply-templates />
</xsl:template>

<xsl:template match="dir:directory">
</xsl:template>

</xsl:stylesheet>



--
 
F

Francesc Guim Bernat

Rainer said:
Hi *,

please consider the following problem:
I have a XML document which includes some html elements.
I want to replace only the <div> element:

I specified two templates, one matches everything ("*"),
one matches only the "div". As far as I understand, the most specific
rule should apply, i.e. the div rule if the element is a <div>.
Click to expand...

That's not true, not the most specific rule is applied. The first rule
applied is the firts rule that is declared, for instance, in your sample
the first rule in that the expression match results true is:

<xsl:template match="*">

on the other hand you can declare a template with a specific priority
(with attribute priority). In this case, nor the first tempalte is
applied, the template with more priority is applied, in your sample if
you daclare that the second template has more priority this will be applied.

Francesc Guim Bernat

http://francesc.guim.net

But the div rule is never applied! Where is my mistake?

TIA!
Rainer Herbst


The XML document:
<?xml version="1.0" encoding="UTF-8"?>
<page>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="HTML Tidy, see www.w3.org" name="generator"/>
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"/>
<meta content="index" name="robots"/>
<meta content="Universitaet Potsdam" name="keywords"/>
<meta content="Microsoft FrontPage 4.0" name="GENERATOR"/>
<meta content="FrontPage.Editor.Document" name="ProgId"/>
<link href="http://www.uni-potsdam.de/over/unilogol.ico" rel="shortcut
icon"/>
<title>Homepage der Universität Potsdam</title>
</head>
<body vlink="#808080" link="#336699" bgcolor="#ffffff">
<div>wrong!!!</div>
<p align="center">unterschrift</p>
</body>
</html>
<dir:directory xmlns:dir="http://apache.org/cocoon/directory/2.0"
name="pressemitteilungen" lastModified="1064833858000" date="29.09.03
13:10" size="4096" sort="name" reverse="false" requested="true">
<dir:file name="first.xml" lastModified="1064833858000" date="29.09.03
13:10" size="62"/>
</dir:directory>
</page>


My stylesheet:

<?xml version="1.0" standalone="no"?>

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:dir="http://apache.org/cocoon/directory/2.0" >


<!-- all elements -->
<xsl:template match="*">
<xsl:copy select=".">
<xsl:for-each select="@*">
<xsl:attribute name="{name(.)}">
<xsl:value-of select="."/>
</xsl:attribute>
</xsl:for-each>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>

<xsl:template match="div">
<xsl:for-each
select="/page/dir:directory[@name='pressemitteilungen']/dir:file">
<xsl:value-of select="@name"/>
</xsl:for-each>
</xsl:template>

<xsl:template match="/page">
<xsl:apply-templates />
</xsl:template>

<xsl:template match="dir:directory">
</xsl:template>

</xsl:stylesheet>
Click to expand...
 
A

A. Bolmarcich

Hi *,

please consider the following problem:
I have a XML document which includes some html elements.
I want to replace only the <div> element:

I specified two templates, one matches everything ("*"),
one matches only the "div". As far as I understand, the most specific
rule should apply, i.e. the div rule if the element is a <div>.

But the div rule is never applied! Where is my mistake?

TIA!
Rainer Herbst


The XML document:
<?xml version="1.0" encoding="UTF-8"?>
Click to expand...

The document is not encoded in UTF-8. See later comment.
<page>
<html xmlns="http://www.w3.org/1999/xhtml">
Click to expand...

Here you give this html element and it sub-elements a namespace. The
matches in the XSL must be on the namespace qualified element name.
<head>
<meta content="HTML Tidy, see www.w3.org" name="generator"/>
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"/>
<meta content="index" name="robots"/>
<meta content="Universitaet Potsdam" name="keywords"/>
<meta content="Microsoft FrontPage 4.0" name="GENERATOR"/>
<meta content="FrontPage.Editor.Document" name="ProgId"/>
<link href="http://www.uni-potsdam.de/over/unilogol.ico" rel="shortcut
icon"/>
<title>Homepage der Universität Potsdam</title>
Click to expand...

The above line has a non UTF-8 sequence of bytes after "Universit".
</head>
<body vlink="#808080" link="#336699" bgcolor="#ffffff">
<div>wrong!!!</div>
<p align="center">unterschrift</p>
</body>
</html>
[snip]

My stylesheet:

<?xml version="1.0" standalone="no"?>

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:dir="http://apache.org/cocoon/directory/2.0" >


<!-- all elements -->
<xsl:template match="*">
<xsl:copy select=".">
Click to expand...

Note: the copy element does not have a select attribute.
<xsl:for-each select="@*">
<xsl:attribute name="{name(.)}">
<xsl:value-of select="."/>
</xsl:attribute>
</xsl:for-each>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>

<xsl:template match="div">
Click to expand...

This does not match the div elements in the document because the div
elements in the document are in a namespace. You need to match on
something like xhtml:div where the xhtml: prefix is associated with
the correct namespace using an attribute like

xmlns:xhtml="http://www.w3.org/1999/xhtml"
[snip]
 
P

Patrick TJ McPhee

%
%
% Rainer Herbst wrote:

% > one matches only the "div". As far as I understand, the most specific
% > rule should apply, i.e. the div rule if the element is a <div>.

% That's not true, not the most specific rule is applied. The first rule
% applied is the firts rule that is declared, for instance, in your sample
% the first rule in that the expression match results true is:
%
% <xsl:template match="*">
%
% on the other hand you can declare a template with a specific priority

If you don't apply a priority, one will be applied for you. The effect
of this implicit priority is, roughly speaking, that a more specific
rule will be applied over a more general rule, assuming they both
match the same node.

If you have two templates which have the same priority, and they
match the same node, you have an error, although processors are
allowed to deal with it. I think they generally take the last
template defined.
 
F

Francesc Guim Bernat

If you don't apply a priority, one will be applied for you. The effect
of this implicit priority is, roughly speaking, that a more specific
rule will be applied over a more general rule, assuming they both
match the same node.
Click to expand...

I'm not agree with you, is possible that i'm wrong, but i'll expose my
arguments. I've this xml document:

<?xml version="1.0" encoding="UTF-8"?>
<root>
<node name="MyName">
Text
</node>
<node name="YourName">
Text
</node>
</root>

and i apply this simple template:

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:fo="http://www.w3.org/1999/XSL/Format">
<xsl:template match="root">
<newRoot>
<xsl:for-each select="node">
<xsl:apply-templates select="."/>
</xsl:for-each>
</newRoot>
</xsl:template>
<xsl:template match="node">
<msg> I'm the less specific template </msg>
</xsl:template>
<xsl:template match="node[name='MyName']">
<msg> I'm one of the most specific template (MyName) </msg>
</xsl:template>
<xsl:template match="node[name='YourName']">
<msg> I'm one of the most specific template (Your name) </msg>
</xsl:template>
</xsl:stylesheet>

Where the second template is less specific than the third and fourth
template.
The result of apply this last stylesheet on the first xml is this:


<?xml version="1.0" encoding="UTF-8"?>
<newRoot xmlns:fo="http://www.w3.org/1999/XSL/Format">
<msg> I'm the less specific template </msg>
<msg> I'm the less specific template </msg>
</newRoot>

in this sample the less specific rule have been applied, having both
templates the same priority. Then i think that nor the most spicific
rule is applied , is applied the firts one (with the same priority).

Francesc Guim

http://francesc.guim.net
 
R

Rainer Herbst

Francesc said:
If you don't apply a priority, one will be applied for you. The effect
of this implicit priority is, roughly speaking, that a more specific
rule will be applied over a more general rule, assuming they both
match the same node.
Click to expand...


I'm not agree with you, is possible that i'm wrong, but i'll expose my
arguments. I've this xml document:

<?xml version="1.0" encoding="UTF-8"?>
<root>
<node name="MyName">
Text
</node>
<node name="YourName">
Text
</node>
</root>

and i apply this simple template:

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:fo="http://www.w3.org/1999/XSL/Format">
<xsl:template match="root">
<newRoot>
<xsl:for-each select="node">
<xsl:apply-templates select="."/>
</xsl:for-each>
</newRoot>
</xsl:template>
<xsl:template match="node">
<msg> I'm the less specific template </msg>
</xsl:template>
<xsl:template match="node[name='MyName']">
<msg> I'm one of the most specific template (MyName) </msg>
</xsl:template>
<xsl:template match="node[name='YourName']">
<msg> I'm one of the most specific template (Your name) </msg>
</xsl:template>
</xsl:stylesheet>

Where the second template is less specific than the third and fourth
template.
The result of apply this last stylesheet on the first xml is this:


<?xml version="1.0" encoding="UTF-8"?>
<newRoot xmlns:fo="http://www.w3.org/1999/XSL/Format">
<msg> I'm the less specific template </msg>
<msg> I'm the less specific template </msg>
</newRoot>

in this sample the less specific rule have been applied, having both
templates the same priority. Then i think that nor the most spicific
rule is applied , is applied the firts one (with the same priority).

Francesc Guim

http://francesc.guim.net
Click to expand...
shouldn't it be [@name='MyName']?


--
 
F

Francesc Guim Bernat

Yes, my StyleSheet is wrong. You're in the correct way,i don't know why,
but i thought that i had red what i was saying in some XLST book, and of
course i didn't. Thanks for your replies.

Francesc Guim

pd: the correct output was :

<?xml version="1.0" encoding="UTF-8"?><newRoot
xmlns:fo="http://www.w3.org/1999/XSL/Format"><msg> I'm one of the most
specific template (MyName) </msg><msg> I'm one of the most specific
template (Your name) </msg></newRoot>


Rainer said:
Francesc said:
If you don't apply a priority, one will be applied for you. The effect
of this implicit priority is, roughly speaking, that a more specific
rule will be applied over a more general rule, assuming they both
match the same node.
Click to expand...



I'm not agree with you, is possible that i'm wrong, but i'll expose my
arguments. I've this xml document:

<?xml version="1.0" encoding="UTF-8"?>
<root>
<node name="MyName">
Text
</node>
<node name="YourName">
Text
</node>
</root>

and i apply this simple template:

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:fo="http://www.w3.org/1999/XSL/Format">
<xsl:template match="root">
<newRoot>
<xsl:for-each select="node">
<xsl:apply-templates select="."/>
</xsl:for-each>
</newRoot>
</xsl:template>
<xsl:template match="node">
<msg> I'm the less specific template </msg>
</xsl:template>
<xsl:template match="node[name='MyName']">
<msg> I'm one of the most specific template (MyName) </msg>
</xsl:template>
<xsl:template match="node[name='YourName']">
<msg> I'm one of the most specific template (Your name) </msg>
</xsl:template>
</xsl:stylesheet>

Where the second template is less specific than the third and fourth
template.
The result of apply this last stylesheet on the first xml is this:


<?xml version="1.0" encoding="UTF-8"?>
<newRoot xmlns:fo="http://www.w3.org/1999/XSL/Format">
<msg> I'm the less specific template </msg>
<msg> I'm the less specific template </msg>
</newRoot>

in this sample the less specific rule have been applied, having both
templates the same priority. Then i think that nor the most spicific
rule is applied , is applied the firts one (with the same priority).

Francesc Guim

http://francesc.guim.net
Click to expand...
shouldn't it be [@name='MyName']?
Click to expand...
 

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