ISO/TR 22126-2:2025

ISO/TR 22126-2:2025 - Overview

ISO/TR 22126-2:2025 is a Technical Report by ISO/TC 68 that demonstrates how the ISO 20022 e‑Repository can be represented using semantic web technologies. The document uses a focused case study around the ISO 20022 sample message auth.016 to show practical conversions and modelling choices:

• Transforming an ISO 20022 XML message into an RDF instance graph.
• Demonstrating SPARQL transformations that convert the auth.016 message into a FIX TradeCaptureReport (35=AE) message (referred to as “FIX AE”).
• Expressing the ISO 20022 metamodel, business components and message components with a custom RDF vocabulary, and where feasible, representing those schemas in OWL (OWL DL/OWL 2) or as annotation properties.
• Creating instance graphs aligned to the e‑Repository and discussing trade‑offs such as ordering versus inference suitability.

This report explores modelling, tooling and conversion choices rather than prescribing a single production implementation.

Key technical topics and requirements

• RDF and OWL representation: How to map the ISO 20022 e‑Repository constructs into RDF triples and OWL schemas, using OWL DL where decidability is needed.
• Graph transformations & SPARQL: Example SPARQL rules and graph workflows to transform message graphs (G graph → G3 graph) and to convert between ISO 20022 and FIX encodings.
• Ecore vs RDF/OWL reconciliation: Discussion of differences between the Eclipse/EMF Ecore (EMOF) model used by the e‑Repository and semantic web standards, and implications for schema/instance separation.
• Ordering and structured data: Options for preserving message ordering (RDF Collections, Containers, blank nodes) while keeping graphs amenable to RDFS/OWL inference.
• Practical tooling notes: Considerations such as mechanical conversion of the e‑Repository, file/namespace handling, and use of tooling (including Python/pyecore).
• Validation & inference: Limits and uses of OWL/RDFS inference and alternative schema approaches (e.g., SHACL) for constraints and validation.

Practical applications

• Interoperability between ISO 20022 and FIX-based systems via semantic mappings and automated transformation rules.
• Data integration and enrichment: Loading ISO 20022 messages into graph databases for federated queries, linkage and reasoning.
• Ontology-driven tooling: Building OWL-based ontologies to enable reasoning, semantic validation, and reuse across financial messaging ecosystems.
• Migration and modernization: Assisting practitioners converting legacy XML/message repositories into linked data platforms.

Who should use this standard

• Financial messaging architects, data architects and integration engineers
• Semantic web engineers and ontology modelers working in finance
• Payment systems operators, trading venues and middleware vendors
• Developers building transformation pipelines (ISO 20022 ↔ FIX) and graph-based analytics

Related standards and technologies

• ISO 20022 (message standards and e‑Repository)
• FIX Protocol (TradeCaptureReport / Orchestra)
• RDF, RDFS, OWL (OWL DL / OWL 2), SPARQL
• SHACL (validation), EMOF/Ecore (ISO 20022 internal model)
• ISO 22126 series (related guidance on semantic technology for financial services)

Keywords: ISO/TR 22126-2:2025, ISO 20022, RDF, OWL, OWL DL, e-Repository, SPARQL, FIX AE, auth.016, semantic technology, metamodel.