Examinando por Autor "Cong, Zijie"

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A Directory of Heterogeneous Services
(CEUR Workshop proceedings, 2011) Cong, Zijie; Fernández, Alberto; Soto, Carlos
This paper presents a directory of heterogeneous web services, which addresses the issue of service discovery involving heterogeneous description languages such as OWL-S, SAWSDL, WSDL and plain text. Service descriptions are mapped into a unified description model, which captures various important elements in different service description approaches. Our directory then performs service registration, automatic discovery and manual browsing utilizing these unified models. A preliminary evaluation shows a satisfying result.
Behavioral Matchmaking of Semantic Web Services
(CEUR Workshop proceedings, 2010) Cong, Zijie; Fernández, Alberto
Service matchmaking is an integral link of service discovery, composition, invocation and other similar tasks under Service-Oriented Architecture (SOA). Most current approaches measure the degree of match of two services based merely on their I/O pairs which could leads to false results. This paper presents an approach for matchmaking in Se- mantic Web Services (SWS) that considers each service as a sub-graph of the semantic network of the ontology formed by inputs, outputs, pre- and post-conditions with contribution of syntactical information such as keywords and textual descriptions. The similarity between services is de- ¿¿ned as the similarity between these graphs. The aim of this approach is to reveal the internal work ¿¿ow and intention of service, i.e. behavior, thus it agrees with human intuition to a larger extent than existing approaches.
Bridging the gap between service description models in service matchmaking
(IOS Press, 2012) Fernández, Alberto; Cong, Zijie; Baltá, Analay
In service-oriented architectures (SOA) the process of service discovery involves the matchmaking between service advertisements and service requests. Most approaches assume that both service advertisements and service requests are expressed using the same description language as well as domain ontologies. However, in large-scale open environments that assumption does not hold. In this paper we present a method that addresses the semantic mismatches at service description level. In particular, we focus on the alignment of service description models and service matchmaking on the unified request and advertisements. We propose a matchmaking method that encompasses different semantic, syntactic and hybrid service description languages.
Enabling Web Service Discovery in Heterogeneous Environments
(Inderscience Publishers, 2013) Cong, Zijie; Fernández, Alberto
In large, open environments, service discovery has to face the challenge of heterogeneity. Service advertisements published by different organizations or individuals may differ in their description models, thus expressiveness levels. Even on the same expressiveness level, organizations may use assorted domain ontologies. In addition, a service discovery tool may not have a global view of all service advertisements in the system. Unfortunately, most contemporary service discovery approaches rely on these key factors. This paper presents a method that addresses the mismatch problem in description models. A neutral model is proposed in this work for aligning different service description models. A matchmaking method that encompasses different semantic, syntactic and hybrid service description languages based on this neutral model is also presented. Implementation and evaluation of the proposed method showed a satisfactory result.