grouping by nodes questions

bonekrusher · July 13th, 2010, 08:45 AM

Hi, I am trying to group some child nodes but having a problem. I want to group all children nodes of <prelreqs> except if the child node name is <safety>. Then I want to process those children as a group.

When I use the below for-each-group construct, I get an error with Saxon 9.1.0.7

Code:

<xsl:for-each-group select="prelreqs" group-by="child::*[not(name(.) = 'safety')]">
    <xsl:sort select="current-grouping-key()"/>
    <xsl:for-each select="current-grouping-key()">
        <!--do something-->
    </xsl:for-each>
</xsl:for-each-group>

error:

Code:

XPTY0004: Required item type of first argument of name() is node(); supplied value has
  item type xs:anyAtomicType

The error is thrown on this line:

Code:

<xsl:for-each select="current-grouping-key()">

Thanks.

samjudson · July 13th, 2010, 08:51 AM

You're not actually 'grouping' there, you are just trying to filter. The following would be easier:

Code:

<xsl:for-each select="preleqs/*[name() != 'safety']">
 ...
</xsl:for-each>

Martin Honnen · July 13th, 2010, 08:56 AM

I don't understand what you want to achieve, current-grouping-key() gives you a single atomic item so what should a for-each select="current-grouping-key()" achieve exactly?

mhkay · July 13th, 2010, 09:29 AM

I can't relate the error message you're getting to the code you've shown - I would want to see a complete reproducible example. However, as others have pointed out, the code you're written doesn't make much sense.

bonekrusher · July 13th, 2010, 10:58 AM

You are all correct. I need to filter rather then sort.

Thanks for the help.