Abstract
Constraint specification is an essential and significant part in Service-Oriented Architecture (SOA). Expressive specifications of constraints are highly required for effective accomplishment of the distinct phenomenon in SOA like service discovery, execution of service and service composition. However, the precise specification is only obtained through well-formed descriptions of both syntax and semantics. Yet, the majority of existing approaches has described constraints focusing on well-defined syntax. Thus, representations of rigorous semantics are absent in major numbers of the existing constraint specifications related to SOA. To address this issue, in this paper, an ontology-based constraint specification is proposed for SOA that can be applied in three aspects—service discovery, service execution and service composition. These proposed constraints are specified in meta-model level. Further, the proposed approach is implemented using Protege. Moreover, it is also illustrated using a suitable case study to prove its practical usability.
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