Comparing 2 node sets based on attributes

[lagadhere]

i'm new to xslt pls provide the xslt that compare two node based on the attribute values.input.xml:\[code\]<comp><alink><link id="0003"/><link id="0001"/><link id="0002"/> </alink><bibsection><bib id="0001">2007</bib> <bib id="0002">2008</bib><bib id="0003">2009</bib> </bibsection> </comp>\[/code\]my output should be,output.xml:\[code\]<comp><alink> <link id="0003"/><year>2009</year> <link id="0001"/><year>2007</year> <link id="0002"/><year>2008</year> </alink> <bibsection><bib id="0001">2007</bib> <bib id="0002">2008</bib> <bib id="0003">2009</bib> </bibsection> </comp>\[/code\]thanks in advance.