Find nodes with the same couple of attributes with xslt and add a new node
问题 I need to analyse the following XML input: <LIST> <PRODUCT TYPE="1" REP="0"> <SUB CAT="1.1" COUNT="2"> <ITEM NAME="OCC" BEGIN="0" ND="49"> </ITEM> <ITEM NAME="OCC" BEGIN="0" END="49"> </ITEM> </SUB> </PRODUCT> <PRODUCT TYPE="1" REP="1"> <SUB CAT="1.1" COUNT="1"> <ITEM NAME="PRC" BEGIN="0" END="49"> </ITEM> </SUB> </PRODUCT> </LIST> and transform it with Xslt to obtain the following result: <LIST> <PRODUCT TYPE="1" REP="0"> <SUB CAT="1.1" COUNT="2"> <MULTIPLE /> <ITEM NAME="OCC" BEGIN="0" END=