The semantics for interoperations among peers is expressed in a logic of mental attitudes and action
formalized in a first order modal language
and provides an unambiguous reference point for implementations of interoperations.There exists some defects in the semantics of traditional persistent goal
which make initiator lose their controls of interoperations.In order to solve this problem
this paper brings forward the concept of degree of perseverance
which means the grade of commitment of interoperations.Perseverant goal
based on the concept of degree of perseverance
is an improvement on persistent goal
and realizes supports of different levels of commitment for interoperations.