General Strategy for Querying Web Sources in a Data Federation Environment

Discovering services acquires importance as Service-Oriented Computing (SOC) becomes an adopted paradigm. SOC’s most popular materializations, namely Web Services technologies, have different challenges related to service discovery and, in turn, many approaches have been proposed. As these approaches are different, one solution may be better than another according to certain requirements. In consequence, choosing a service discovery system is a hard task. To alleviate this task, this paper proposes eight criteria, based on the requirements for discovering services within common service-oriented environments, allowing the characterization of discovery systems. These criteria cover functional and non-functional aspects of approaches to service discovery. The results of the characterization of 22 contemporary approaches and potential research directions for the area are also shown.

Section: Service Discovery Requirements In Web-based Environmentsmentioning

confidence: 99%

A Survey of Approaches to Web Service Discovery in Service-Oriented Architectures

Crasso

Zunino

Campo

2011

“…The advent of Web 2.0 brought us the notion of user-defined mashups (see Benslimane, Dustdar, & Sheth, 2008;Maximilien, Ranabahu, & Gomadam, 2008) that integrate services possibly from several providers via a user-friendly graphical user interface that allows a naïve user to try and construct an application in an on-line fashion. Thus, the development task moves from the experienced programmer to the less skilled users (see Firat, Wu, & Madnick, 2009;Kongdenfha, Benatallah, Vayssière, Saint-Paul, & Casati, 2009). There is a plethora of mashup applications like Yahoo Pipes (http://pipes.yahoo.com/), Google Maps (http://maps.google.com/), IBM Damia (http://services.alphaworks.ibm.com/damia/), and Microsoft Popfly (http://www.popfly.com/).…”

Section: Summary Of Experimental Findingsmentioning

confidence: 99%

Accelerating Web Service Workflow Execution via Intelligent Allocation of Services to Servers

Vassiliadis

Pitoura

Zarras

et al. 2010

The appropriate deployment of web service operations at the service provider site plays a critical role in the efficient provision of services to clients. In this paper, the authors assume that a service provider has several servers over which web service operations can be deployed. Given a workflow of web services and the topology of the servers, the most efficient mapping of operations to servers must then be discovered. Efficiency is measured in terms of two cost functions that concern the execution time of the workflow and the fairness of the load distribution among the servers. The authors study different topologies for the workflow structure and the server connectivity and propose a suite of greedy algorithms for each combination.

“…Databases are used in every sector of the industry including business, health care, education, government, and libraries (Liao & Palvia, 2000;Firat et al, 2009;Aiken et al, 2011;Siau & Rossi, 2011). As databases continue to become ever more critical components of both large and small systems, the success of development projects will become increasingly dependent on the accuracy of the data models (Ramakrishnan & Gehrke, 2002;.…”

Section: Introductionmentioning

confidence: 99%

A Meta-Analysis Comparing Relational and Semantic Models

Nah

Siau

Cao

2011

Data modeling is the sine quo non of systems development and one of the most widely researched topics in the database literature. In the past three decades, semantic data modeling has emerged as an alternative to traditional relational modeling. The majority of the research in data modeling suggests that the use of semantic data models leads to better performance; however, the findings are not conclusive and are sometimes inconsistent. The discrepancies that exist in the data modeling literature and the relatively low statistical power in the studies make meta-analysis a viable choice in analyzing and integrating the findings of these studies.