juergen wrote:
> My xml file look like:
> 
> <Sequences>
> <Comment text="This is a test comment!" id="<CallingSeq name="Sequence 01" 

This isn't XML. In XML attributes cannot contain character <, it must be 
escaped as &lt;

> The attribute "id" is a xml string, from which I need a few infos 
> "descriptions" in my html document. The document should be created by xslt an 
> I can't used the string functions from xslt (more than two "desc" in the 
> string could be founded). 
> Is it possible to translate the attribute string in a node structure?

It's really hard to create such weird document with XSLT. Even 
disable-output-escaping won't help creating < charcter in attribute.
The only solution is to emulate XML:

<xsl:text disable-output-escaping="yes">&lt;Comment text="This is a test 
comment!" id="</xsl:text>
             <CallingSeq name="Sequence 01"
             path="TestProject-01/Sequence Folder 01"
             guid="d49f2b33-ab40-486a-898a-4fc8a179bb75" desc="test seq 
01" label="SeqV1"
             version="1" /><Step name="Comment step 01" 
path="TestProject-01/Step Folder
01" guid="0ec07b91-8c03-47d0-8b2e-b9c0c4e9ef20" desc="comment 01"
label="StepV1" version="1" />
             <xsl:text>" /></xsl:text>

And beware again - the result isn't XML.

-- 
Oleg Tkachenko [XML MVP, MCAD]
http://blog.tkachenko.com