Dynamic User Interface Supporting Type Analysis for RDFGears

This thesis describes the design and implementation of an interactive, dynamic and functional web-based Graphical User Interface for RDFGears. RDFGears is a data integration framework for the semantic web. It allows users to express and execute complex data algorithms without the need to be concerned with the implementation details. The framework has its own language namely RDF Gears Language (RGL) that is used to formally define the data integration process as a workflow and an engine to evaluate the workflow and perform the data integration. This thesis proposes an application that can be used as an interface between RDF Gears and users. We introduce a new design of the user interface and new features to improve the usability of RDF Gears. More support for editing nested workflows, query editor, interactive nested node copier and property editor are some of the features that are introduced to improve the usability and the interactivity. RDFGears Function Definition Language is introduced to improve the extensibility of RDF gears engine. Core functions or user defined functions of RDF Gears can be extended without worried of the UI support. We also introduce a type system that implemented in the user interface. It performs the type checking operation during the workflow construction and provides live feedback. An evaluation to evaluate the correctness of our implementation is presented. The evaluation shows the improvement that we have made and the usability of the new features.Web Information SystemSoftware TechnologyElectrical Engineering, Mathematics and Computer Scienc