Crate map

The workspace is 33 crates, versioned and released independently. Dependencies point down the tiers described in System design:

• L0, the record core. ifc-model owns the entity graph and the Codec trait, and knows no schema, codec or domain.
• L1, schema and codecs. ifc-schema holds the bundled EXPRESS tables; ifc-step and ifc-xml implement Codec. Codecs never import domain semantics.
• L2, views, validation, authoring and geometry. Each domain crate is a borrowed projection over the model, and sibling domains never depend on one another. ifc-geometry, ifc-georef and ifc-alignment lower geometry into the neutral Axiolid model.
• L3, the facade. openbim-ifc re-exports the crates above behind cargo features, with a thin default.
• L4, the bindings. JavaScript, Python and C wrap the facade through a shared host-independent core.

The map below is generated from each crate's manifest, so the dependency column is what cargo resolves, not what anyone remembers. Each crate's reference page has its overview, features and latest changes; the capability matrix says what each implements.

Facade

Crate	Status	Depends on	Description
openbim-ifc	Implemented	the core, domain and geometry crates, each behind a feature	Facade for the openBIM IFC crates: pick codecs and domains as features.

Model, codecs, schema, authoring and validation

Crate	Status	Depends on	Description
ifc-author	Implemented	ifc-model, ifc-schema	Schema-checked IFC authoring: construct entities by attribute name with arity and type validation.
ifc-model	Implemented	—	The IFC entity graph: storage and structural queries, free of domain semantics and serialization.
ifc-schema	Implemented	—	IFC schema as data: entity table, supertype chain, attribute names.
ifc-step	Implemented	ifc-model	STEP physical file (ISO 10303-21) codec for the IFC model.
ifc-validate	Implemented	ifc-model, ifc-schema	Schema conformance: WHERE rules, cardinality, GUID and reference integrity.
ifc-xml	Implemented	ifc-model, ifc-schema	ifcXML (ISO 10303-28) codec for the IFC model.

Domain views

Crate	Status	Depends on	Description
ifc-approval	Implemented	ifc-model, ifc-schema	Bounded IFC4 approval resource semantics.
ifc-classification	Implemented	ifc-model, ifc-schema	Classification systems, document references, libraries, external references.
ifc-constraint	Implemented	ifc-model, ifc-schema	Bounded IFC4 metric, objective, and constraint relationships.
ifc-control	Implemented	ifc-model, ifc-schema	Bounded IFC control semantics: permits, project orders, action requests, and performance history.
ifc-cost	Implemented	ifc-model, ifc-schema	Cost semantics as a borrowed view over the IFC model.
ifc-element-type	Implemented	ifc-model, ifc-schema	Element, resource, and process type definitions: the IfcTypeObject catalogue.
ifc-material	Implemented	ifc-model, ifc-schema	Material definitions: layer sets, profile sets, constituents, usage.
ifc-occurrence	Implemented	ifc-model, ifc-schema	Built element and distribution occurrence classes and their type pairing.
ifc-properties	Implemented	ifc-model, ifc-schema	Property sets, quantities, and unit resolution. No geometry.
ifc-resource	Implemented	ifc-model, ifc-schema	Construction resources: labour, equipment, material, crew, subcontract.
ifc-schedule	Implemented	ifc-model, ifc-schema	IFC scheduling: IfcTask/IfcWorkSchedule, sequencing, 4D linkage.
ifc-spatial	Implemented	ifc-model, ifc-schema	IFC spatial containment and objectified relationship traversal: project, site, building, storey, element.
ifc-structural	Implemented	ifc-model, ifc-schema	Structural analysis model: members, connections, actions, reactions, loads.
ifc-style	Implemented	ifc-model, ifc-schema	Presentation: styles, colours, textures, layers, annotation.
ifc-systems	Implemented	ifc-model, ifc-schema	Distribution systems, ports, and connectivity between elements.
ifc-tabular	Implemented	ifc-model, ifc-schema	Structured IFC value containers indexed by position or time.
ifc-template-catalog	Implemented	ifc-schema	Versioned IFC PSD/QTO catalog definitions and correction overlays

Geometry, georeferencing and alignment

Crate	Status	Depends on	Description
ifc-alignment	Implemented	ifc-model, ifc-schema	IFC4x3 linear positioning: alignments, referents, linear placement, spirals.
ifc-geometry	Partial	ifc-alignment, ifc-model, ifc-schema	IFC semantic views lowered into the format-neutral geometry DAG.
ifc-georef	Implemented	ifc-model, ifc-schema	Georeferencing: map conversion, coordinate reference systems, site placement.

Language bindings

Crate	Status	Depends on	Description
openbim-ifc-binding-core	Implemented	openbim-ifc	Host-independent core shared by the openbim-ifc language bindings (WebAssembly, C ABI, Python).
openbim-ifc-capi	Implemented	openbim-ifc-binding-core	Versioned, memory-safe C ABI for openbim-ifc: read, edit and write IFC STEP files from C and C++.
openbim-ifc-dotnet	Implemented	—	The OpenBim.Ifc NuGet package: .NET bindings for openbim-ifc over its versioned C ABI.
openbim-ifc-py	Implemented	openbim-ifc-binding-core	Python bindings for openbim-ifc: read, edit and write IFC STEP files from Python.
openbim-ifc-wasm	Implemented	openbim-ifc-binding-core	WebAssembly bindings for openbim-ifc: read, edit and write IFC STEP files from JavaScript.

Command-line tool

Crate	Status	Depends on	Description
openbim-ifc-cli	Partial	openbim-ifc	The openbim-ifc command: validate, convert, inspect, query and edit IFC files (STEP, ifcXML and ifcZIP), and exchange their values as CSV, TSV or XLSX tables, from a shell or CI.

Not in this repository

• The generic ISO 10303-21 STEP and ISO 10303-11 EXPRESS machinery lives in openbim-step, shared with the other standard families.
• Geometry evaluation (meshing, booleans, sections) lives in Axiolid; see the Axiolid boundary.
• Other openBIM standards (IDS, BCF, bSDD, …) are separate repositories under openbimrs.