Invited Papers.- Patterns for the Pragmatic Web.- Conceptual Graphs for Semantic Web Applications.- Knowledge Representation and Reasoning in (Controlled) Natural Language.- What Is a Concept?.- Applications of Description Logics: State of the Art and Research Challenges.- Methodologies for the Reliable Construction of Ontological Knowledge.- Using Formal Concept Analysis and Information Flow for Modelling and Sharing Common Semantics: Lessons Learnt and Emergent Issues.- On the Need to Bootstrap Ontology Learning with Extraction Grammar Learning.- Conzilla - A Conceptual Interface to the Semantic Web.- Theoretical Foundations.- Variables in Concept Graphs.- Arbitrary Relations in Formal Concept Analysis and Logical Information Systems.- Merge-Based Computation of Minimal Generators.- Representation of Data Contexts and Their Concept Lattices in General Geometric Spaces.- Local Negation in Concept Graphs.- Morphisms in Context.- Contextual Logic and Aristotle's Syllogistic.- States of Distributed Objects in Conceptual Semantic Systems.- Knowledge Engineering and Tools.- Hierarchical Knowledge Integration Using Layered Conceptual Graphs.- Evaluation of Concept Lattices in a Web-Based Mail Browser.- D-SIFT: A Dynamic Simple Intuitive FCA Tool.- Analyzing Conflicts with Concept-Based Learning.- Querying a Bioinformatic Data Sources Registry with Concept Lattices.- How Formal Concept Lattices Solve a Problem of Ancient Linguistics.- A New Method to Interrogate and Check UML Class Diagrams.- Knowledge Acquisition and Ontologies.- Language Technologies Meet Ontology Acquisition.- Weighted Pseudo-distances for Categorization in Semantic Hierarchies.- Games of Inquiry for Collaborative Concept Structuring.- Toward Cooperatively-Built Knowledge Repositories.- What Has Happened to Ontology.- Enhancing the Initial Requirements Capture of Multi-Agent Systems Through Conceptual Graphs.- Outline of trikonic?* k: Diagrammatic Trichotomic.