xslt select a node value based on the value of another node -

i being tasked creating csv file using xslt produce information. far have need however, there 1 bit struggling per example below.

<issuesexport xmlns="http://www.mynamesapce.co.uk/import"> <materials> <material>   <code>wb821</code>   <name>concentrate</name> </material> <material>   <code>wb820</code>   <name>additive</name> </material> </materials> <issues>  <issue>   <formulacode>test</formulacode>   <materialbatch>     <materialcode>wb821</materialcode>     <batchnumber>sdfsd</batchnumber>     <ismanualaddbatch>false</ismanualaddbatch>     <isfinished>true</isfinished>     <weight>0</weight>     <cost>0</cost>   </materialbatch>   <issuebatchnumber>df34323</issuebatchnumber> </issue> 

what need grab name //material/name issue/materialbatch/materialcode = material/code.

my current xslt looks this

<xsl:if test="i:materialbatch/i:materialcode=//i:material/i:code">   <xsl:value-of select="//i:materials/i:material/i:name"/> </xsl:if> 

which evaluating true , giving result of concentrate.

i grateful if tell me going wrong

thank you

your test returns true, because comparing 2 node-sets - , such test returns true if 1 of nodes in set matches node in set b.

the result "concentrate" because

<xsl:value-of select="//i:materials/i:material/i:name"/> 

returns value of first node of set matching select expression.

xslt has build-in mechanism looking referenced values. in order use it, start defining key @ top-level of stylesheet:

<xsl:key name="material-bycode" match="i:material" use="i:code" />   

then, context of issue can use:

<xsl:value-of select="key('material-by-code', i:materialbatch/i:materialcode)/i:name"/> 

to retrieve corresponding name.