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.

This book contains the thoroughly refereed and revised best papers from the 5th International Conference on Web Information Systems and Technologies, WEBIST 2009, held in Lisbon, Portugal, in March 2009, organized by the Institute for Systems and Technologies of Information, Control and Communication (INSTICC), in collaboration with ACM SIGMIS and co-sponsored by the Workflow Management Coalition (WFMC). The 22 papers presented in this book were carefully reviewed and selected from 203 submissions. The papers are grouped in four parts on Internet Technology; Web Interfaces and Applications; Society, e-Business, and e-Government; and Web Intelligence.