This conference paper combines a domain knowledge graph with an LLM to interpret and check safety‑management regulatory texts in the infrastructure industry. The authors design prompts that ground the LLM in graph‑based context, enabling more accurate compliance checking and query answering over complex regulations. Prompt patterns are tailored to tasks such as extracting obligations, mapping clauses to graph entities, and explaining compliance gaps. For PSM, the approach is directly transferable to OSHA PSM, EPA RMP, and Seveso regulations: it illustrates how prompt engineering, when coupled with structured knowledge, can support automated or semi‑automated compliance checking, regulatory cross‑referencing, and audit preparation while reducing hallucinations and
