diagramming
Create professional diagrams using Mermaid or DOT/Graphviz. Mermaid for flowcharts, sequences, classes, ER, Gantt, architecture with semantic coloring and WCAG AA accessibility. DOT/Graphviz for pure network graphs, semantic webs, and maximum layout control.
dot-export
Export DOT/Graphviz diagrams from documents to PNG images (default) or SVG. Use after creating documents with DOT code blocks when you need to render them as static images for distribution, GitHub, wikis, or static sites. Supports multiple layout engines (dot, neato, circo, fdp, twopi, osage, patchwork). Processes .md, .html, .mdx, .rst, .adoc files.
mermaid-export
Export Mermaid diagrams from documents to PNG images. MUST be run immediately after creating or editing any Mermaid diagram, BEFORE committing. Processes .md, .html, .mdx, .rst, .adoc files.
notebook
Create professional Jupyter notebooks with zero-execution styling using markdown-based CSS and HTML components following Airbnb DLS principles.
owl
Design and implement OWL 2 ontologies for knowledge representation. Covers RDFS foundations, OWL profiles (EL, QL, RL), class expressions, property characteristics, reasoning patterns, SKOS taxonomies, and the evolving shift toward SHACL. Informed by Kurt Cagle's ontologist perspective.
qlever
Query, configure, and optimize QLever—the high-performance open-source RDF triplestore. Covers SPARQL queries, GeoSPARQL, text search, CLI operations, and public endpoints. Informed by Kurt Cagle's semantic web expertise.
shacl
Design, implement, and validate RDF data with SHACL (Shapes Constraint Language). Covers node shapes, property shapes, constraint components, validation reports, SHACL-SPARQL integration, AI/LLM patterns, UI generation, and taxonomy integration. Informed by Kurt Cagle's ontologist perspective and W3C specifications.
skos
Design, implement, and manage knowledge organization systems with SKOS (Simple Knowledge Organization System). Covers concept schemes, taxonomies, thesauri, controlled vocabularies, semantic relations, mapping, SKOS-XL labels, AI/LLM integration patterns, and SHACL validation. Informed by Kurt Cagle's ontologist perspective and W3C specifications.
sparql
Write, analyze, and optimize SPARQL 1.1 queries for knowledge graphs. Covers RDF, OWL, SHACL, Turtle serialization, and AI/LLM integration patterns. Informed by Kurt Cagle's ontologist perspective.