Given an id, I get some relations:

<xsl:variable name="relations" select="umbraco.library:GetRelatedNodesAsXml(@id)//relation"/>

When I look at them using copy-of, I see they are there:

<xsl:copy-of select="$relations" />

outputs...

<relation childid="1485" parentid="8530" createdate="8/13/2013 10:00:35 PM" typename="Author" typeid="8">

    <comment></comment>
    <node id="1485" path="-1,1087,1326,1331,1485" nodename="Bob Moffitt" createdate="2012-12-14T14:54:21" sortorder="25" writerid="0" level="4" parentid="1331"></node>

</relation>
<relation childid="8531" parentid="8530" createdate="8/13/2013 10:08:11 PM" typename="PrimaryImage" typeid="2">

    <comment></comment>
    <node id="8531" path="-1,1109,1874,7841,8531" nodename="0813 bm regional transit" createdate="2013-08-13T22:06:16" sortorder="0" writerid="32" level="4" parentid="7841"></node>

</relation>
<relation childid="8534" parentid="8530" createdate="8/13/2013 10:27:24 PM" typename="RotatorImage" typeid="3">

    <comment></comment>
    <node id="8534" path="-1,1109,1874,7841,8534" nodename="Regional Transit Bus rotator" createdate="2013-08-13T22:27:11" sortorder="0" writerid="3" level="4" parentid="7841"></node>

</relation>

What I want to be able to do, is just use a filter to get all of the Author relations, like this (this isn't working):

<xsl:variable name="relations" select="umbraco.library:GetRelatedNodesAsXml(@id)//relation[@typename='Author']"/>

I've tried a few different things, like putting the string 'Author' in a variable, so that it's

    <xsl:variable name="Author" select="Author" />

<xsl:variable name="relations" select="umbraco.library:GetRelatedNodesAsXml(@id)//relation[@typename=$Author]"/>

Then I could get to my Author's name (in the node element, property @nodename). Most of the time it's just one Author relations, but sometimes, there are two.

Maybe like this...

<xsl:for-each select="$relations">
<xsl:value-of select="./node/@nodename"/>
</xsl:for-each> 

But I get nothing as soon as I put the [@typename='Author'] on my relations variable.

How can I do it? Thanks for looking.