- | ({S.uri = uri1} as entry1)::tl1,
- ({S.uri = uri2} as entry2)::_ when uri1 < uri2 ->
- entry1::(union_ex tl1 l2)
- | ({S.uri = uri1} as entry1)::_,
- ({S.uri = uri2} as entry2)::tl2 when uri2 < uri1 ->
- entry2::(union_ex l1 tl2)
- | entry1::tl1,entry2::tl2 -> (* same entry *)
- if entry1 = entry2 then (* same attributes *)
- entry1::(union_ex tl1 tl2)
- else
- assert false
+ | (uri1,l1)::tl1,(uri2,_)::_ when uri1 < uri2 -> (uri1,l1)::(union_ex tl1 rs2)
+ | (uri1,_)::_,(uri2,l2)::tl2 when uri2 < uri1 -> (uri2,l2)::(union_ex rs1 tl2)
+ | (uri1,l1)::tl1,(uri2,l2)::tl2 -> if l1 = l2 then (uri1,l1)::(union_ex tl1 tl2)
+ else (uri1,merge l1 l2)::(union_ex tl1 tl2)