Some Issues Of The UML Presentation Of Data Exchange Mechanisms With Web Services

It is accepted that the orientation of computer information systems towards web services is a „best practice“ and an innovative technology in their development. Along with that, web services are a complicated, complex and heterogeneous technology. This requires that their functions are presented at a high level of abstraction, and for that purpose, according to us, it is appropriate to use the UML standard – thus there are created conditions for them to be more easily adopted by a wide circle of specialists. With regard to this, in this publication, having systematized the main capabilities and elements of web services, there are offered solutions for their presentation by means of UML. It has been determined that they can be presented in two main forms – as classes and components, which are closely connected with each other. There is studied the main mechanism of communication between web services, and it is further developed and supplemented with the mechanisms for data exchange between the customer and the web service through the parameters of its operations. By means of specific models there is illustrated the use of complex data structures with web services.