XSLT finding distinct combinations
问题 I am beginner to xslt. I want to find all unique combinations for Year, Month, Day, and Hour. I have following xml file to transform: <Plans> <Plan Name="Plan_1"> <Book Name="Book_1"> <Time Name="AAA"> <Property Name="Year" Value="2001"/> <Property Name="Month" Value="01"/> <Property Name="Day" Value="10"/> <Property Name="Hour" Value="12"/> </Time> <Time Name="BBB"> <Property Name="Year" Value="2001"/> <Property Name="Month" Value="01"/> <Property Name="Day" Value="10"/> <Property Name="Hour