XSL Filter Help Needed

[richie_hackett]

I have an XML document which looks like
<folder>
<link author="ME"/ url="something">
<link author="YOU" url="something else"/>
<folder>
<link author="ME"/ url="something">
<folder>
<link author="ME"/ url="something">
<link author="YOU" url="something else"/>
</folder>
</folder>
</folder>

There can be any number of depths of folders and there can be any
number of authors.

What I want to do is parse the XML and return another XML document with
the applicable links and structure

My XSL looks like
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema" version="1.0">
<xsl:param name="Filter" select="'default value'"/>
<xsl:template match="node() | @* | / | root">
<xsl:copy>
<xsl:apply-templates select="node() | @*" />
</xsl:copy>
</xsl:template>
<xsl:template match='treenode[@Author=$Filter]' />
</xsl:stylesheet>

The idea is generally to be able to return to entire hierachical
structure for each link who have a matching author

The problem is I get an error from the treenode[@... line saying
invalid key pattern. It either has a variable reference or key
function.

Any ideas how I can fix this?

[Martin Honnen]

ri************@hotmail.com wrote:

I have an XML document which looks like
<folder>
<link author="ME"/ url="something">

^^^

<link author="YOU" url="something else"/>
<folder>
<link author="ME"/ url="something">

^^^

<folder>
<link author="ME"/ url="something">

^^^

What are those slash characters supposed to do there? That is not XML.

<xsl:template match='treenode[@Author=$Filter]' />

You have elements named 'folder', 'link' in the above sample but not a
single element named 'treenode'. And the attribute is named 'author' and
not 'Author'. So I have no clue what that stylesheet template has to do
with the markup presented above.

The problem is I get an error from the treenode[@... line saying
invalid key pattern. It either has a variable reference or key
function.

That error does not sound as if it comes from the stuff you have shown.
Do you have any xsl:key elements in the stylesheet?

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[richie_hackett]

Sorry, there were some typos in my original post. I'd generally
offered an example not the actual xml. I have amended the example
based on the comments.

This is all of done thus far, the XSL is as I currently have it. The
Transforming code does little more than apply an argument and apply the
XSL to the XML
<Folders>
<folder>
<link author="ME" url="something"/>
<link author="YOU" url="something else"/>
<folder>
<link author="ME" url="something"/>
<folder>
<link author="ME" url="something"/>
<link author="YOU" url="something else"/>
</folder>
</folder>
</folder>
</Folders

My XSL looks like
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema" version="1.0">
<xsl:param name="Filter" select="'default value'"/>
<xsl:template match="node() | @* | / | root">
<xsl:copy>
<xsl:apply-templates select="node() | @*" />
</xsl:copy>
</xsl:template>
<xsl:template match='link[@author=$Filter]' />
</xsl:stylesheet>>

The problem is I get an error from the treenode[@... line saying

That error does not sound as if it comes from the stuff you have shown.
Do you have any xsl:key elements in the stylesheet?

Not that I'm aware of as I said wht tyou see is what I've got

I've seen variables used many times in apply-templates select=.....
statements but not in match statements. Does the match support
variables?
Thanks for your response

[Martin Honnen]

ri************@hotmail.com wrote:

I've seen variables used many times in apply-templates select=.....
statements but not in match statements. Does the match support
variables?

No, it does not. A match attribute takes a pattern and the specification
restricts that with "It is an error for the value of the match attribute
to contain a VariableReference".

So you will need to write a template for link elements and then do your
checks in the template e.g.
<xsl:template match="link">
<xsl:if test="@author != $Filter">
<xsl:copy>
<xsl:apply-templates select="@* | node()"/>
</xsl:copy>
</xsl:if>
</xsl:template>

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[richie_hackett]

<xsl:template match="link">

<xsl:if test="@author != $Filter">
<xsl:copy>
<xsl:apply-templates select="@* | node()"/>
</xsl:copy>
</xsl:if>
</xsl:template>

Unfortunately it didn't work. I believe the issue is that the folder
element doesn't have an author attribute so doesn't get processed.

If I test the element name and ascertain it's a folder or not the
correct Author, then carry on processing it could build a hierachy with
no links in any of the folders(I think)

The problem is I wish to use to build a navigation tree. The users
will only want to see links or folders containing links applicable to
them. Drilling down through several levels and having no links at the
end would definately be an issue for them

Is this possible or should I try to find a different way

Thanks for your response