Abstract: The web services applications for digital reference
service (WSDRS) of LIS model is an informal model that claims to
reduce the problems of digital reference services in libraries. It uses
web services technology to provide efficient way of satisfying users’
needs in the reference section of libraries. The formal WSDRS model
consists of the Z specifications of all the informal specifications of
the model. This paper discusses the formal validation of the Z
specifications of WSDRS model. The authors formally verify and
thus validate the properties of the model using Z/EVES theorem
prover.