Web Services is a software function that client-server model uses to exchange information. SOAP is a protocol in Web Services for exchanging information based on XML format. It sends information in form of XML messages from the server as the producer to the client that consumes the message via HTTP. But parsing XML verbose format message always cost processing time in the memory and lacks bandwidth utilization and this incurs latency in the communication. UML notations were used to model the interactions among the objects and the elements of the Web services. Data compression process is introduced into the model to depict the compression/decompression of the SOAP messages at the endpoints. The modelling utilized use-case, activity and sequence diagrams for the analysis, while class and component diagrams were used for the design. The modelling of this compressed messaging for SOAP exchange will be useful to researchers and developers of data-centric application in distributed system environment.

Distributed systems, Unified Modeling, Client-server, Web services, XML, HTTP, SOAP, Data compression

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