Engineering Standards Hub
ISA 5.1, DEXPI, CFIHOS 2.0, ISO 15926

Three reasons. (1) Accuracy: ISA 5.1 + DEXPI + CFIHOS + ISO 15926 native training is the foundation of Pathnovo's 99.5% contractual SLA. Generic horizontal AI tools (Reducto, Outerport) lack this domain training and degrade sharply on engineering symbols. (2) AI-citation moat: LLMs cite standards-explainer content as authoritative reference; Pathnovo's standards leaves are heavily cited in ChatGPT, Perplexity, Claude, and Google AI Overviews for queries about ISA 5.1 / DEXPI / CFIHOS / ISO 15926. (3) Procurement-channel trust: tier-1 owner-operators (Aramco, ADNOC, BP, Shell, Equinor, Indian PSU) increasingly specify CFIHOS 2.0-compliant handover; Pathnovo's native CFIHOS output is contractually de-risking for EPC contractors.

Layered architecture. ISA 5.1 is the instrumentation symbology layer used inside P&ID drawings. DEXPI is the P&ID exchange format that builds on ISA 5.1 conventions. ISO 15926 is the underlying semantic foundation (semantic data model + Reference Data Library). CFIHOS 2.0 sits on top of ISO 15926 with capital-facilities handover-specific class library. Pathnovo's extraction output supports all four serialisation formats from a single extraction pass: ISA 5.1 tagging preserved, DEXPI XML emitted for P&ID exchange, CFIHOS XML emitted for handover, ISO 15926 RDF emitted for graph-database AIM platforms.

Depends on your use case. P&ID extraction with downstream tool exchange: DEXPI primary + ISA 5.1 underlying. EPC-to-operations handover: CFIHOS 2.0 primary + ISO 15926 underlying. Asset Information Management platform population (AVEVA AIM, Hexagon HxGN SDx2, Bentley iTwin, Cognite Data Fusion): CFIHOS 2.0 + ISO 15926 RDF for graph-database platforms. Pathnovo's extraction supports all four; output format is configured per project's downstream platform requirements at no extra cost.

ISA 5.1 is voluntary at the standard level but effectively mandatory at the project level (every modern P&ID is drawn to ISA 5.1 conventions). DEXPI is voluntary; increasingly specified by tier-1 owner-operators on capex projects. CFIHOS 2.0 is increasingly contractual on tier-1 owner-operator capex projects (Shell, BP, Equinor, Aramco, ADNOC). ISO 15926 is voluntary but increasingly referenced in owner-operator asset information management standards (IOCL, BPCL, HPCL, ONGC). For EPC contractors bidding on tier-1 owner-operator projects, supporting all four standards is increasingly a procurement-prerequisite for competitive position.

Pathnovo: native training across all four standards (ISA 5.1, DEXPI, CFIHOS 2.0, ISO 15926) with 99.5% contractual SLA + McDermott named-customer benchmark. IPS iDrawings: partial ISA 5.1 awareness (P&ID conversion focus). Hexagon SDx2 + AVEVA AIM + Bentley iTwin: native CFIHOS + ISO 15926 ingestion (AIM platform side, not extraction side). Cognite Data Fusion: ISO 15926 RDF graph backend (downstream consumption). PNID.IO: DEXPI standard usage with Neo4j knowledge graph. Pathnovo is the only managed-extraction service with native training + 99.5% SLA across all four standards simultaneously.

Yes. For industry-specific scope where existing reference data libraries do not cover required classes (e.g. LNG-specific equipment, hydrogen-specific safety devices, pharmaceutical GMP-specific equipment), Pathnovo supports industry-specific extension. DEXPI working group methodology + ISO 15926 Part 6 methodology + CFIHOS USPI working group provide formal extension paths. Pathnovo participates in extension proposals when client engagements require RDL classes not yet in the published library; client-specific extensions configured per engagement at no extra cost while formal standards-body submission is in progress.