UML (Unified Modeling Language) is a collection of somewhat overlapping modeling techniques, thus creating a difficulty in establishing practical guidelines for selecting the most suitable techniques for modeling OO artifacts. This is true mainly with respect to two types of interaction diagrams: Sequence and collaboration. Attempts have been made to evaluate the comprehensibility of these diag...

Web service composition is one of the challenging issues that have been studiedover the past years. It consists of combining existing web services to best suit new user requirements. This paper suggests an UML profile to compose web services based on their behavioral aspects. The Web Service Description Language (WSDL) files are first transformed to Unified Modeling Language (UML) models; then ...

Testing is performed by different types of strategies. Generally testing is performed on code, but if the software can be tested in the earlier phases then most of the errors can be eliminated and can be stopped from propagating to next phase. The proposed work presents a novel design based testing approach that can fix errors in initial phase. To perform design based testing, we need a languag...

This paper presents a formal semantics of UML sequence diagram. In abstract syntax form, a well-formed sequence diagram corresponds to an ordered hierarchical tree structure. The static semantics of a sequence diagram is to check whether it is consistent with the class diagram declaration as well as with its well-formed tree structure. Meanwhile, the dynamic semantics is defined in terms of the...

We present a V − J reduced proper motion (RPM) diagram for stars in the New Luyten Two-Tenths (NLTT) catalog. In sharp contrast to the RPM diagram based on the original NLTT data, this optical-infrared RPM diagram shows distinct tracks for white dwarfs, subdwarfs, and main-sequence stars. It thereby permits the identification of white-dwarf and subdwarf candidates that have a high probability o...

Web Service is an interface which implements business logic. Performance is an important quality aspect of Web services because of their distributed nature. Predicting the performance of web services during early stages of software development is significant. In this paper we model web service using Unified Modeling Language, Use Case Diagram, Sequence Diagram, Deployment Diagram. We obtain the...

An innovative approach of generating test cases from the combination of UML design diagrams has been discussed in this paper. Present work used an approach where petal files of class diagram, sequence diagram and state chart diagram has been used to generate test cases. The test cases thus generated are suitable for static and dynamic testing of system. General Terms Test case generation from U...

Graphical representations of scenarios, such as UML Sequence Diagrams and Message Sequence Charts, serve as a well-accepted means for modeling the interactions among software systems and their environment through the exchange of messages. The Combined Fragments of UML Sequence Diagram permit various types of control flow among messages (e.g., interleaving and branching) to express an aggregatio...