<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alessandro Bozzon</style></author><author><style face="normal" font="default" size="100%">Tereza Iofciu</style></author><author><style face="normal" font="default" size="100%">Antonio Vincenzo Taddeo</style></author><author><style face="normal" font="default" size="100%">Tönnies, Sascha</style></author><author><style face="normal" font="default" size="100%">Wolfgang Nejdl</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Role based Access Control for the integration with Search Engines</style></title><secondary-title><style face="normal" font="default" size="100%">International Workshop on Collaborative Open Environments for Project-Centered Learning</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">09/2007</style></date></pub-dates></dates><pub-location><style face="normal" font="default" size="100%">Crete, Greece</style></pub-location><abstract><style face="normal" font="default" size="100%">Search engine-based features are a basic interaction mean for users to find information inside a Web-based Learning Management Systems (LMS); nonetheless, traditional solutions lack in mechanisms for access rights management for data contained in search engines? indexes. This paper explores the integration of a Role Based Access Control (RBAC) mechanism for the interaction with a search engine in a Webbased LMS. We first outline a reference conceptual model for the design of Web-based LMSs exploiting RBAC by means of WebML, a visual modeling language for the high-level specification of data-intensive Web applications. Then, we propose a model-driven approach for the definition of a RBAC-driven interaction between users and search engines, extending WebML with new modeling primitives and outlining significative modeling patterns for the specification of the visibility and action access control levels.</style></abstract></record></records></xml>