<xsl:param name="first-input" required="yes" />
<xsl:param name="second-input" required="yes" />

<xsl:template match="/" >
   <xsl:copy-of select="$first-input/bookselection/book" />
   <xsl:copy-of select="$second-input" />
</xsl:template>

However, if you do want some changes, you can simply use apply-templates:
<xsl:apply-templates select="$first-input/*" />

Cheers,
-- Abel

I have an application that produces 2 DOM documents in (Java) memory, that need to be processed in an XSLT transformation. I used the first as input source for the transformation and was wondering how to get the second into the picture. It is rather small with 20-30 nodes only. Since it is generated in code it doesn't have an URL, so document() will not work (?). I could pass the dom into a param, but how to reference it?

The first input looks like:

  <bookselection>
        <category>Sience Fiction</category>
        <book>
            <title>Solaris</title>
            <author>Lem</author>
        </book>
        <book>
            <title>Sheep look up</title>
            <author>Brunner</author>
        </book>
    </bookselection>

The second one looks like

 <categories>
        <category>Sience Fiction</category>
        <category>Cooking</category>
        <category>Horror</category>
    </categories>

What I need to achive is:
<books>
        <categories>
            <category selected="true">Sience Fiction</category>
            <category>Cooking</category>
            <category>Horror</category>
        </categories>
        <book>
            <title>Solaris</title>
            <author>Lem</author>
        </book>
        <book>
            <title>Sheep look up</title>
            <author>Brunner</author>
        </book>
    </books>

XSLT 2.0 would be OK. Help is greatly appreciated.
:-) stw