PolyXML Industry Schema Corpus & Multi-Language Benchmark Suite
20 Battle-Tested Enterprise Standards • 45 Modules • 6,800+ Owned Types

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A curated collection of real-world, battle-tested enterprise XML Schema (XSD) suites spanning banking, healthcare, transit, aviation, capital markets, defense, geospatial, and regulatory domains. Used for stress testing, regression validation, and performance benchmarking of the PolyXML multi-language code generation compiler.

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🏛️ Why an Industry Schema Corpus?

Across open-source XSD generator trackers, certain widely adopted industry schemas are notorious for failing compilation, hanging in infinite loops, or triggering out-of-memory errors. These real-world enterprise schemas stress every corner of the W3C XML Schema 1.0 and 1.1 specifications:

• Circular Type Graphs & Self-Referential Types: Flight trajectories, process graphs, and linked asset events (handled via Tarjan Strongly Connected Component detection).
• Deep Inheritance & Polymorphic Hierarchies: Multi-level xs:extension inheritance trees (e.g. 6+ levels deep in BPMN 2.0 and NeTEx).
• Multi-Module Cross-Namespace Imports: Shared cryptographic and metadata roots (e.g. W3C xmldsig, xmlenc, xlink, xAL) imported across protocol versions.
• Extreme Scale & Facet Density: Massive industrial standards with thousands of types (e.g. NeTEx with 2,400+ types, HL7 CDA with 1,450+ types, UBL with 1,000+ types).
• Multi-Megabyte Monolithic Schemas: Massive schema files such as NATO UCI (8.0 MB single file) and HL7 FHIR (2.6 MB).

The default validation run checks schema parsing and module ownership. A separate UCI check generates code and compiles five destination languages; Rust and C++ large-module compilation are tracked in the linked PolyXML issues.

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📦 Included Industry Suites

Domain	Standard / Organization	Key Schemas	Complexity Characteristics
Banking / Payments	ISO 20022 camt.054.001.08	camt.054.001.08.xsd	Bank-to-Customer Debit/Credit Notification. 265+ types, extreme facet restrictions, ISO currency/clearing codes, partial date types.
Banking / Payments	ISO 20022 pacs.008.001.09	pacs.008.001.09.xsd	Financial Institutional Customer Credit Transfer. 163+ types, dense inter-bank routing hierarchies.
Banking / SEPA	ISO 20022 pain.001.001.10	pain.001.001.10.xsd	Customer Credit Transfer Initiation (SEPA payments). 167+ types, cash management structures.
Procurement / Invoicing	OASIS UBL 2.1	UBL-Invoice-2.1.xsd UBL-Order-2.1.xsd	Universal Business Language (PEPPOL e-invoicing). 1,000+ types, 1,600+ elements, CCTS core component types, ETSI XAdES signatures.
Derivatives / Capital Markets	ISDA FpML 5.12	fpml-main-5-12.xsd fpml-ird-5-12.xsd	Financial products Markup Language for OTC derivatives, interest rate swaps, equity options, and credit default swaps. 250+ types, 24 circular cut points.
Financial Reporting	XBRL 2.1	xbrl-instance-2003-12-31.xsd xbrl-linkbase-2003-12-31.xsd	Extensible Business Reporting Language for SEC and ESMA statutory filings. Multi-file XLink relationships, recursive arcs.
Healthcare	HL7 CDA R2.1	CDA.xsd POCD_MT000040UV02.xsd	Clinical Document Architecture. 1,450+ types, complex narrative mixed content, extensive clinical code vocabularies.
Healthcare	HL7 FHIR R4	fhir-single.xsd fhir-xhtml.xsd	Fast Healthcare Interoperability Resources. 169+ types, 53 root resources, embedded W3C XHTML narrative blocks.
EV Charging / Smart Grid	ISO 15118 (V2G)	V2G_CI_MsgDef.xsd xmldsig-core-schema.xsd	Electric Vehicle-to-Grid communication. Cross-namespace import with W3C XML Digital Signatures (xmldsig). Tests multi-schema deduplication (#81).
Aviation / Air Traffic	ICAO & FAA FIXM 4.0	Fixm.xsd Nas.xsd Flight.xsd	Flight Information Exchange Model for NextGen air traffic management. 120+ types, 48 circular flight trajectory cut points.
Transit / Timetables	CEN NeTEx (CEN/TS 16614)	NeTEx_publication_timetable.xsd	European standard for public transport static data, timetables, and stop topology. Colossal scale: 2,400+ types, 720+ root elements.
Transit / Telemetry	CEN SIRI (CEN/TS 15531)	siri_all_framework-v2.0.xsd	Service Interface for Real Time Information across European public transport operators.
Transit / Rail	railML 2.4	railML.xsd infrastructure.xsd	Railway Markup Language for rail network infrastructure, rolling stock, and interlocking timetables.
Defense / Autonomous Systems	US DoD / NATO UCI v2.5	UCI_MessageDefinitions_v2_5_0.xsd	Universal Command and Control Interface for autonomous and unmanned aerial systems. 8.0 MB monolithic schema.
BPM / Workflow	OMG BPMN 2.0	BPMN20.xsd Semantic.xsd	Business Process Model and Notation. Deep extension inheritance (tBaseElement → tFlowElement → tFlowNode → tTask), heavy xs:substitutionGroup usage.
Geospatial / GIS	OGC KML 2.2	ogckml22.xsd atom-author-link.xsd	Open Geospatial Consortium Keyhole Markup Language (Google Earth, GIS features). 216+ types, 276 elements, OASIS CIQ address integration.
Geospatial / GIS	OGC GML 3.2.1 (ISO 19136)	gml_extract_all_objects_v_3_2_1.xsd	Geography Markup Language foundation for geographic coordinate systems, topologies, and feature geometries.
Identity / Security	OASIS SAML 2.0	saml-schema-protocol-2.0.xsd saml-schema-assertion-2.0.xsd	Security Assertion Markup Language for enterprise single sign-on (SSO), federation, and token exchange. Integrates W3C xmlenc and xmldsig.
B2B Messaging	OASIS ebMS 3.0 / AS4	ebms-header-3_0.xsd soap-envelope-1.2.xsd	Secure B2B message packaging used by Peppol, e-Codex, and energy grids. SOAP 1.1/1.2 envelope integration.
Meta-Schema	W3C XML Schema	XMLSchema.xsd xml.xsd	The normative self-referential W3C schema for XML Schema itself. Validates recursive schema definition parsing.

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📁 Directory Structure

polyxml-schema-corpus/
├── schemas/
│   ├── aviation-fixm/         # FAA / Eurocontrol / ICAO FIXM 4.0
│   ├── bpmn20/                # OMG BPMN 2.0 process & diagram schemas
│   ├── defense-uci/           # US DoD / NATO UCI v2.5 (8.0 MB schema)
│   ├── finance-fpml/          # ISDA FpML 5.12 OTC derivatives & swaps
│   ├── geospatial-kml/        # OGC KML 2.2 GIS & Earth models
│   ├── hl7-cda/               # HL7 Clinical Document Architecture R2.1
│   ├── hl7-fhir/              # HL7 FHIR R4 healthcare resources & XHTML
│   ├── iso15118/              # ISO 15118 EV charging & W3C xmldsig
│   ├── iso20022/              # SEPA & ISO 20022 (camt.054, pacs.008, pain.001)
│   ├── messaging-as4/         # OASIS ebMS 3.0 / AS4 & SOAP envelopes
│   ├── regulatory-xbrl/       # XBRL 2.1 financial filings & XLink
│   ├── security-saml/         # OASIS SAML 2.0 assertions & protocols
│   ├── transit-netex/         # CEN NeTEx timetables & OGC GML 3.2.1
│   ├── transit-railml/        # railML 2.4 railway transport schemas
│   ├── transit-siri/          # CEN SIRI real-time transit telemetry
│   ├── ubl-2.1/               # OASIS UBL 2.1 procurement & invoicing
│   └── w3c-xmlschema/         # Normative W3C XML Schema definition
├── polyxml.toml               # Multi-module workspace configuration (45 modules)
├── runner.py                  # Automated validation and benchmark harness
├── scripts/check_uci_codegen.py # Bounded UCI generated-code compile check
├── LICENSE                    # MIT License
├── NOTICE                     # Standards attribution & third-party copyright notices
└── README.md

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⚡ Usage

UCI generated-code compilation

With Python 3.12+, Go, TypeScript (tsc), Java, and .NET 8 installed, run:

python3 scripts/check_uci_codegen.py --bin ../PolyXML/target/debug/polyxml

The script generates the four-schema UCI module into a temporary directory, compiles one language at a time, and uses PolyXML's memory-cap wrapper when it is available. Select a target with --lang python (repeat the option for several targets). Full Rust and C++ UCI compilation is tracked in PolyXML issue #92.

1. Run the Validation & Benchmark Suite

Ensure polyxml is installed or compiled in ../PolyXML/target/release/polyxml:

python3 runner.py

To test against an explicit polyxml binary:

python3 runner.py --bin /path/to/polyxml

2. Validate Individual Schemas

You can validate any individual schema or directory directly via the PolyXML CLI:

# Validate SEPA Credit Transfer (pain.001)
polyxml validate schemas/iso20022/pain.001.001.10.xsd

# Validate OASIS UBL 2.1 Invoice
polyxml validate schemas/ubl-2.1/maindoc/UBL-Invoice-2.1.xsd

# Validate CEN NeTEx publication timetable (2,400+ types)
polyxml validate schemas/transit-netex/NeTEx_publication_timetable.xsd

# Validate NATO UCI Message Definitions (8.0 MB)
polyxml validate schemas/defense-uci/UCI_MessageDefinitions_v2_5_0.xsd

3. Build & Generate Code Across Modules

The root polyxml.toml defines modular boundaries with dependency resolution and type deduplication across all 45 modules:

# Test schema resolution & module graph in dry-run mode
polyxml build --dry-run

# Generate code for all 7 languages into ./generated/
polyxml build

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⚖️ Standards Attribution & License

• Repository Tooling & Automation: Licensed under the MIT License.
• Normative XML Schemas: Authored by respective international standards bodies (ISO, OASIS, W3C, OMG, HL7, ISDA, XBRL, ICAO/FAA, CEN, railML.org, OGC). Retain all copyright notices, warranties, and terms of use stipulated by their publishing bodies. See NOTICE for full attribution details.