Hi All,

I'm trying to read all the xml files present in a folder using collection() function. Also I'm using saxon:discard-document with that. If I use like code below, I can get the expected result.

<xsl:for-each select="for $file in
                collection('file:///D:/Ramesh/My_Projects/Repository/NMIRepository/Repository/NE/NE?select=*.xml') return saxon:discard-document($file)">
                <file-loaded href="{base-uri()}" />
            </xsl:for-each>
But if I use like code below, I get an error.

<xsl:variable name="filePath">file:///D:/Ramesh/My_Projects/Repository/NMIRepository/Repository/NE/NE/</xsl:variable>
    <xsl:variable name="allFiles" select="collection(concat($filePath, '?select=*.xml'))"></xsl:variable>

<xsl:for-each select="saxon:discard-document($allFiles)">
                <file-loaded href="{base-uri()}" />
            </xsl:for-each>
The error is:
1.Error in call to extension function
2.Extensions.discardDocument:Sequence contain more than one value; Java method expects only one.

Can anyone explain why this happens and help about this?

thanks

__________________
Rummy

Why this happens: the extension function saxon:discard-document is defined to take a single document node as its argument, but you are supplying a sequence of documents. (Sorry, that's almost exactly what the error message already says - I don't know how else to explain it more clearly).

What to do about it: apply the method to each document individually:

<xsl:for-each select="collection('...')/discard-document(.)">
  ...
</xsl:for-each>

Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer's Reference

Thanks Mike. I'm clear now. I understood the mistake I made. Can you explain me what "saxon:discard-document" does? How it helps in memory usage? Sorry if I had extended the topic.

I would suggest that you ask saxon-specific questions on the saxon-help mailing list or forum - go to the Saxon project on SourceForge for details. (The mailing list is better because more people use it, but you have to subscribe).

You might like to look at previous threads on the subject first:

http://saxon.markmail.org/search/?q=discard-document

Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer's Reference

Thanks Mike. I have gone through the old threads present.