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.