PolyXML Industry Schema Corpus & Multi-Language Benchmark Suite
20 Battle-Tested Enterprise Standards • 46 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 parameterized check generates source and compiles seven destination languages serially under a hard cgroup memory limit. Scheduled/manual CI checks UCI, CDA, UBL Invoice, NeTEx, and FpML; ordinary PR CI checks CDA and UBL Python syntax.

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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 (46 modules)
├── runner.py                  # Automated validation and benchmark harness
├── scripts/check_module_codegen.py # Parameterized bounded compile check
├── scripts/check_uci_codegen.py # UCI compatibility entry point
├── LICENSE                    # MIT License
├── NOTICE                     # Standards attribution & third-party copyright notices
└── README.md

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⚡ Usage

Bounded generated-code compilation

Install Python 3.12+, Go, g++ (C++20), Java 25, TypeScript 5 (tsc), .NET 8 SDK, and Rust. Linux with cgroup v2 and a working systemd user manager is required locally; CI uses the system manager through passwordless sudo.

python3 scripts/check_module_codegen.py --bin ../PolyXML/target/debug/polyxml \
  -m defense_uci --memory-mib 12000 --output /tmp/uci-compile-results
python3 scripts/check_module_codegen.py --bin ../PolyXML/target/debug/polyxml \
  -m ubl_invoice -l python --output /tmp/ubl-python-results

The harness reads the selected module and its transitive dependencies from polyxml.toml, emits actual source, and checks one language at a time. Repeat -l / --lang to select targets; the default is all seven. check_uci_codegen.py remains a compatibility entry point selecting defense_uci and accepts the same options (including required --output).

Every generation and compile command runs in a separate systemd scope with MemoryMax=3500M by default and MemorySwapMax=0. UCI Rust needs the larger 12,000 MiB budget used by its scheduled/manual CI job; local full-UCI runs should pass --memory-mib 12000 with sufficient headroom. The ten-minute timeout stops the entire scope, including compiler children. The cap must leave at least 1 GiB available for the host; no uncapped fallback is permitted. --memory-mib and --timeout allow deliberate budget changes. Rust checks explicitly enable split_units = true with 250-type chunks; chunking is opt-in in PolyXML. Rust checks disable debug info and incremental compilation to avoid unnecessary compiler memory overhead. Rust/Go builds use one worker; Java's heap is additionally limited to 2200 MiB. --system selects CI's system manager and runs compilers as the invoking user. Missing tools fail before generation; --allow-missing is for local partial runs only and records explicit skips.

The output directory must be new. It retains manifests, generated file counts and bytes, full command logs, GNU time resource reports (peak process RSS), and machine-readable elapsed times/exit statuses. Generated source and build products are temporary. RSS is a process measurement, not total cgroup memory; the kernel cap covers the whole tree. These are syntax/compile checks, not XML runtime round trips. Any failure or timeout returns nonzero; a failed target stops that module run and remains visible in CI artifacts by default. --keep-going checks the remaining targets while retaining a nonzero final exit status; scheduled/manual CI uses it to collect all seven outcomes.

PR/push CI checks hl7_cda and ubl_invoice Python. Weekly and manual CI runs all seven languages for defense_uci, hl7_cda, ubl_invoice, transit_netex, and finance_fpml, with heavy matrix jobs serialized. The original validation/dry-run job remains separate.

Published 2026-10-03 results show UCI passing all seven targets locally and in GitHub CI at 12000 MiB. Full validation also passes all 20 suites and the 46-module graph after inline attribute and schema-for-schemas fixes. Other heavy modules have remaining compiler failures, retained in scheduled matrix artifacts. The W3C meta-schema uses its vendored XML import, and the shared w3c_xml module owns XML-namespace helper types.

Harness regression tests (including real user-cgroup limit and timeout checks):

python3 -m unittest discover -s tests -v

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 46 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.