standard Muenchian grouping- XSLT

[St Petry]

I was developing an xsl that converts the input xml to other xml using XSLT as mentioned Below.Logic: In the input xml, I mention four sub-elements "vehicle_No, vehicle_Model, Description, colour" in "Vehicle". I want to get a result " if "vehicle_No, vehicle_Model" matches with the next "vehicle" then the value in the "description" should become elements and then the output should look like..., Also Muenchian grouping for "Description" when "vehicle_No, vehicle_Model" matches,Sample O/P: If Matched\[code\]<vehicle> <car> <color>BLACK</color> <hood>RED</hood> </car></vehicle>\[/code\]If aren't Matched\[code\]<vehicle> <car> <color>BLACK</color> <hood>RED</hood> </car> <cycle> <color>violet</color> </cycle></vehicle>\[/code\]If in case i get a same value for "description" mentioned in input xml and "vehicle_No, vehicle_Model" aren't matches. Then the o/p should look like\[code\]<vehicle> <car> <color>BLACK</color> <hood>RED</hood> </car> <cycle> <color>violet</color> </cycle></vehicle><vehicle> <car> <color>RED</color> </car></vehicle>\[/code\]My Input XML File:\[code\]<t><Vehicle> <vehicle_No>123</vehicle_No> <vehicle_Model>Audi</vehicle_Model> <Description>car.color</Description> <colour>BLACK</colour></Vehicle><Vehicle> <vehicle_No>123</vehicle_No> <vehicle_Model>Audi</vehicle_Model> <Description>car.hood</Description> <colour>RED</colour></Vehicle><Vehicle> <vehicle_No>123</vehicle_No> <vehicle_Model>BMW</vehicle_Model> <Description>Bus.Brakes</Description> <colour>steel</colour></Vehicle><Vehicle> <vehicle_No>123</vehicle_No> <vehicle_Model>BMW</vehicle_Model> <Description>Bus.steering</Description> <colour>black</colour></Vehicle><Vehicle> <vehicle_No>234</vehicle_No> <vehicle_Model>benz</vehicle_Model> <Description>cycle.color</Description> <colour>violet</colour></Vehicle><Vehicle> <vehicle_No>345</vehicle_No> <vehicle_Model>nissan</vehicle_Model> <Description>car.color</Description> <colour>RED</colour></Vehicle></t>\[/code\]Expected Output in XML:\[code\]<t><Vehicle> <car> <color>BLACK</color> <hood>RED</hood> </car> <Bus> <Brakes>steel</Brakes> <Steering>black</Steering> </Bus> <cycle> <color>violet</color> </cycle></Vehicle><vehicle> <car> <color>RED</color> </car></vehicle></t>\[/code\]Please let me know if Question was unclear.