This book contains a selection of the best papers from WEBIST 2009 (the 5th Int- national Conference on Web Information Systems and Technologies), held in Lisbon, Portugal, in 2009, organized by the Institute for Systems and Technologies of Inf- mation, Control and Communication (INSTICC), in collaboration with ACM SIGMIS and co-sponsored by the Workflow Management Coalition (WFMC). The purpose of the WEBIST series of conferences is to bring together researchers, engineers and practitioners interested in the technological advances and business applications of Web-based information systems. The conference has four main tracks, covering different aspects of Web information systems, including Internet Techn- ogy, Web Interfaces and Applications, Society, e-Communities, e-Business and e-Government. WEBIST 2009 received 203 paper submissions from 47 countries on all con- nents. A double-blind review process was enforced, with the help of more than 150 experts from the International Program Committee; each of them specialized in one of the main conference topic areas. After reviewing, 28 papers were selected to be published and presented as full papers and 44 additional papers, describing work-- progress, published and presented as short papers. Furthermore, 35 papers were p- sented as posters. The full-paper acceptance ratio was 13%, and the total oral paper acceptance ratio was 36%. Therefore, we hope that you find the papers included in this book interesting, and we trust they may represent a helpful reference for all those who need to address any of the research areas mentioned above. January 2010 José Cordeiro Joaquim Filipe

Inhalt

Internet Technology.- Collaboration and Human Factor as Drivers for Reputation System Effectiveness.- Agent-Oriented Programming for Client-Side Concurrent Web 2.0 Applications.- The SHIP: A SIP to HTTP Interaction Protocol.- Efficient Authorization of Rich Presence Using Secure and Composed Web Services.- Web Interfaces and Applications.- Information Supply of Related Papers from the Web for Scholarly e-Community.- When Playing Meets Learning: Methodological Framework for Designing Educational Games.- SiteGuide: A Tool for Web Site Authoring Support.- ArhiNet - A Knowledge-Based System for Creating, Processing and Retrieving Archival eContent.- Optimizing Search and Ranking in Folksonomy Systems by Exploiting Context Information.- Adaptation of the Domain Ontology for Different User Profiles: Application to Conformity Checking in Construction.- The RDF Protune Policy Editor: Enabling Users to Protect Data in the Semantic Web.- An Unsupervised Rule-Based Method to Populate Ontologies from Text.- Web Spam, Social Propaganda and the Evolution of Search Engine Rankings.- Society, e-Business and e-Government.- Making the Invisible Visible: Design Guidelines for Supporting Social Awareness in Distributed Collaboration.- Interaction Promotes Collaboration and Learning: Video Analysis of Algorithm Visualization Use during Collaborative Learning.- Modelling the B2C Marketplace: Evaluation of a Reputation Metric for e-Commerce.- Web Intelligence.- Using Scientific Publications to Identify People with Similar Interests.- Website-Level Data Extraction.- Anti-folksonomical Recommender System for Social Bookmarking Service.- Classifying Structured Web Sources Using Support Vector Machine and Aggressive Feature Selection.- Scalable Faceted Ranking in Tagging Systems.- Answering Definition Questions: Dealing with Data Sparseness in Lexicalised Dependency Trees-Based Language Models.