Using Logical Operators in OWL-S Condition statement

Hi,
Is it possible to use logical operators (e.g. "and" or
"or") in OWL-S condition statements. For example

ap1.o1 < ap2.o2 or ap1.o1 > ap3.o3

OR

ap1.o1 < ap2.o2 and ap1.o1 > ap3.o3


ap1, ap2, ap3 are atomic processes and o1, o2 and o3
are outputs of atomic processes.

If yes, either the OWL-S API support to create
condition statements with logical operators.

bye.

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