xml - Combining text values together using XSL -

i have xml file. snippet:

<?xml version="1.0" encoding="utf-8"?>  <assignmenthistory> <w20160104>     <studentitems>         <item>             <name counsel="13">name 1</name>             <type>type 1</type>         </item>     </studentitems> </w20160104> 

i wanting create xsl script works xml file. however, refers above external xml file using method:

<xsl:variable name="myxml" select "document('history.xml')"/> 

in main xml file, in 'meeting' node has content:

<meetingdate day="7" dayshort="thu" dayfull="thursday" month="1" monthshort="jan" monthfull="january" year="2016"/> 

what want do, combine @day, @month , @year attributes end "wyyyymmdd" can locate:

/assignmenthistory/wyyyymmdd 

so can include values node in myxml in final output.

can please advise me how take attributes , convert them "wyyyymmdd"?

thank much.

thanks comments made progress. can format wyyyymmdd text value. struggling iterate external document:

            <xsl:variable name="assignhistory" select="document('assignhistory.xml')"/>             <xsl:variable name="y" select="meetingdate/@year"/>             <xsl:variable name="m" select="format-number(meetingdate/@month, '00')"/>             <xsl:variable name="d" select="format-number(meetingdate/@day, '00')"/>             <xsl:variable name="week" select="concat('w',$y,$m,$d)"/>             <xsl:value-of select="$week"/><br />             <xsl:for-each select="$assignhistory/assignmenthistory/*[name()=$week]/studentitems/item">               student (or assistant): <xsl:value-of select="name"/><br />             </xsl:for-each> 

nothing showing.

this 1 possible way produce string in desired format "wyyymmdd" :

<xsl:template match="meetingdate">     <xsl:variable name="y" select="@year"/>     <xsl:variable name="m" select="format-number(@month, '00')"/>     <xsl:variable name="d" select="format-number(@day, '00')"/>     <xsl:variable name="name" select="concat('w',$y,$m,$d)"/>     <xsl:value-of select="$name"/> </xsl:template> 

xsltranfsorm.net demo

output :

w20160107 

xsl:variables used above split expression chunks make easier read. actual usage selecting target element xml document variable should :

<xsl:value-of select="$myxml/assignmenthistory/*[name()=$name]"/>