Problem: Existing RDF stores lacked native Prolog reasoning and the performance needed for large-scale knowledge representation in production AI systems.
What we built: Designed and built VivaceGraph — a full graph database, RDF store, and Prolog implementation in Common Lisp. The codebase is open source and has been adopted by researchers in AI and knowledge engineering worldwide.
Outcome: Actively maintained; forked and used across multiple research institutions. Available at github.com/kraison/vivace-graph-v3.
Tags: Common Lisp · Graph Databases · Knowledge Representation · Prolog · Open Source