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Systems-of-systems (SoS) represent a class of systems resulted from the interaction among independent systems that cooperate to form a larger and more complex system aiming at accomplishing global missions. An inherent characteristic of SoS is the high heterogeneity of their constituent systems, which are distributed, independent, and developed with different technologies. In addition, SoS are highly...
In this paper we propose a conceptual semantic based tourism platform that enables users to consume mash up applications by using a multi agent system. We explore different mechanisms for discovery, publishing, composition and querying of services. In particular, we present a methodology for collecting, organizing and searching data distributed in different resources-RDF data sets- and - Application...
A service-oriented application is composed of multiple web services to fulfill complex functionality that cannot be provided by individual web service. The combination of services is not random. In many cases, a set of services are repetitively used together in various applications. We treat such a set of services as a service composition pattern. The quality of the patterns is desirable due to the...
A service-oriented application is composed of several web services to provide complex functionality that a single web service cannot provide. A set of services along with their control flows can be frequently used in multiple applications. Such services form a service composition pattern which is well tested in the numerous adoptions. Reusing service composition patterns in service composition provides...
Web Services become more prevalent in Internet or Intranet environments, bringing many new design challenges, due to stringent requirements such as reliability, scalability, efficiency, security, reusability, adaptability, interoperability, maintainability, availability, portability, etc. Although some of them has been gotten a lot of concerns in present research works, but the availability in composite...
Semantic Web Services discovery and composition: paths along workflows Web Services allow the composition of new services on top of existing, partial ones. Using standard languages, Semantic Web Services can provide the description of their input parameters and preconditions for execution, as well as the output and effects of their execution. The availability of such descriptions demand the investigation...
In order to increase their stealth, malware commonly use the self-modification property of programs. By doing so, programs can hide their real code so that it is difficult to define a signature for it. But then, what is the meaning of those programs: the obfuscated form, or the hidden one? Furthermore, from a computability perspective, it becomes hard to speak about the program since, its own code...
Web services are interfaces that describe a collection of operations that are network-accessible through standardized Web protocols. When a required operation is not found, several services can be compounded to get a composite service that performs the desired task. To find this composite service, a search process over a huge search space must be performed. The algorithm that composes the services...
SOCK is a process calculus for the modeling of service oriented systems recently extended with primitives for dynamic fault and compensation handling. In this paper we investigate the relationships between the sagas calculi for compensable flow composition and SOCK. First, we present an encoding of parallel sagas (with interruption and centralized compensation) into SOCK. Then, we discuss a new semantics...
In the service collaboration field, there exists the need to combine two or more services together to fulfill a complex goal. Though service composition is an active research field, most of solutions are focused on Web services and lack of the consideration for business-level collaboration. In this paper we present a discovery architecture that supports business-level service composition. In our architecture,...
Web service chaining forms one of the basic operation during Web service composition. To decide whether services can be chained, semantic matching between the I/O is usually evaluated. In this paper we propose an approach considering possible adaptation of output data before it is consumed as input by other service. We also define the corresponding rules based on which it is evaluated if the chaining...
The text puts forward improved fuzzy relation composition: weighted fuzzy relation composition, then discusses and analyses its application in fuzzy synthetic evaluation.
Intuitionistic fuzzy sets are generalization of fuzzy sets. In this paper, the definition of complement of an intuitionistic fuzzy graph (IFG) is given and some properties of self-complementary IFGs are studied; The operations on IFGs such as union, join, Cartesian product and composition are defined and some of their properties are also analyzed.
Service interface description is one of the most important problems in services-oriented software architecture, and formal description methods are considered to be a promising approach for service interface. Presently the typical Web service description language (WSDL) only provided the syntax level information that needed by the service interaction without containing the dynamic behavioral protocol...
Pattern-based composition is rather complex and need formal treatments. This paper demonstrates an approach based on logic programming language Golog, whose logical foundations roots in the situation calculus. The first step is formalizing design patterns by a set of fluents, actions and corresponding axioms in the situation calculus. Based on the formal specification of the underlying patterns, we...
We address the problem of optimizing mediator-based service composition where the services and the desired composition (goal) functionality are represented as i/o automata with loops. The objective of optimization is to minimize the costs of communications and computations necessary to realize the goal from the existing services. We develop an algorithm to compute the minimum cost of an automaton...
Emerging as the popular choice for leading Internet companies to expose internal data and resources, RESTful Web services are attracting increasing attention in the industry. While automating WSDL/SOAP based Web service composition has been extensively studied in the research community, automated RESTful Web service composition in the context of service-oriented architecture (SOA), to the best of...
The process of semantic web service composition arranges several web services into one composite service to realize complex workflows with an exploitation of semantics. This paper proposes an approach to automatic semantic web service composition. Its advantage is good scalability regarding the complexity of user constraints and pre/post conditions. Based on these conditions it propagates the value...
Algorithms for composing Web services (WS) traditionally utilize the functional and quality-of-service parameters of candidate services to decide which services to include in the composition. Users often have differing experiences with a WS. While trust in a WS is multi-faceted and consists of security and behavioral aspects, our focus in this paper is on the latter. We adopt a formal model for trust...
The process of semantic Web service composition arranges several Web services into one composite service to realize complex workflows with an exploitation of semantics. This paper proposes a framework to automatic semantic Web service composition. Its advantage is that a huge amount of computation is performed during preprocessing and the composition approach is designed to exploit the parallel execution...
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