How to distinct groups of values?

[DieWui]

I am trying to build a query that select unique groups of values. I know how to group values and select distinct values, but I don't see how to select distinct groups of values regarless of the order of the elements considered. More precisely:My XML is something like this:\[code\]<A> <B type="1">value1</prop> <B type="2">value2</prop> <B type="3">value3</prop> <B type="4">value4</prop><C> <D>XXX</D></C><C> <D>YYY</D></C></A><A> <B type="3">value3</prop> <B type="4">value4</prop> <B type="2">value2</prop><C> <D>XXX</D></C><C> <D>YYY</D></C></A>\[/code\]Here I would like to make groups of \[code\]<B>\[/code\] values from all \[code\]<A>\[/code\] nodes and select only unique sets of values. For instance, here:value1+value2+value3+value4 andvalue2+value3+value4+value1These two sets of values should be only unique if some or all of the values are different.Thank you very much in advance for your help.