This book constitutes the thoroughly refereed post-conference proceedings of the Second International Conference on on Signal-Image Technology and Internet-Based Systems, SITIS 2006, held in Hammamet, Tunisia, in December, 2006.

Query Languages and Information Retrieval.- An Automatic Video Text Detection, Localization and Extraction Approach.- Towards an MPEG-7 Query Language.- Characterizing Multimedia Objects through Multimodal Content Analysis and Fuzzy Fingerprints.- VeXQuery: An XQuery Extension for MPEG-7 Vector-Based Feature Query.- Towards a Flexible Query Language.- Annotate, Query and Design Multimedia Documents by Metadata.- Shifting Predicates to Inner Sub-expressions for XQuery Optimization.- Multimedia Databases and Systems.- AIRSTD: An Approach for Indexing and Retrieving Spatio-Temporal Data.- A Bridge between Document Management System and Geographical Information System.- A New Digital Notary System.- QFCP: A Router-Assisted Congestion Control Mechanism for Heterogeneous Networks (Extended).- Formalization of Multimodal Languages in Pervasive Computing Paradigm.- Generation of Spatial Decision Alternatives Based on a Planar Subdivision of the Study Area.- Distributed Architectures and Applications.- Market-Based Adaptive Discussion Forums.- Keyword Enhanced Web Structure Mining for Business Intelligence.- Modeling Multi-agent System of Management Road Transport: Tasks Planning and Negotiation.- An Agent-Based Organizational Model for Cooperative Information Gathering.- A Dynamic Grid Scheduler with a Resource Selection Policy.- DHT-Based Self-adapting Replication Protocol for Achieving High Data Availability.- Semantic Interoperability and Emerging Semantics.- A Hierarchical n-Grams Extraction Approach for Classification Problem.- Extension of Schema Matching Platform ASMADE to Constraints and Mapping Expression.- An Ontology Based Method for Normalisation of Multidimensional Terminology.- Semantic and Conceptual Context-Aware Information Retrieval.- A Multi-representation Ontology for the Specification of Multi-context Requirements.- Web Engineering and Services.- Scalability of Source Identification in Data Integration Systems.- Semantic Annotation of Web Pages Using Web Patterns.- Towards Formal Interfaces for Web Services with Transactions.- Extracting the Latent Hierarchical Structure of Web Documents.- CBR Method for Web Service Composition.- Web Semantics and Semi Structured Data.- Binding Structural Properties to Node and Path Constraints in XML Path Retrieval.- A Comparison of XML-Based Temporal Models.- An Adaptation Approach: Query Enrichment by User Profile.- Extending SOA with Semantic Mediators.