openbim-ifcx

OpenBIM.rs crate for IFC5 / IFCX. It reads and writes ifcx_alpha files losslessly, composes layered nodes into a resolved tree as upstream does (flatten, then compose), and checks attribute values against the file's schemas, collecting every failure with its node path, attribute id, and JSON pointer (IfcxFile::validate, validate_flat, validate_attributes). It resolves imports into an ordered layer stack through a caller-supplied resolver (LayerStackBuilder::build for one main layer, build_all for several layers stacked as upstream's ifcx compose does), validates the stack against the schemas of all its layers (LayerStack::validate), and federates schemas and data in upstream order; in that order an imported layer overrides the layer that imports it. flatten_owned and LayerStack::into_federated move nodes and attribute values instead of copying them, which makes flattening large models several times faster than flatten over borrowed nodes. The composed tree shares sub-trees between instances instead of copying them, and reference cycles and unknown references are typed errors.

Features:

• integrity (default): check SRI-style sha256-<base64> (also sha384, sha512) integrity values on imports, using sha2 and base64. Without it, imports that carry integrity are rejected.
• fs: FsResolver, which loads imports from local files. The crate never uses the network.

See the repository capabilities, the documentation with a Rust guide, and the viewer, which shows an IFCX file in the browser.

Licensed under MIT.