openbim-mmc

Safe, lossless Rust mechanics for Multi-Model Container 2.0 archives used in DIN 18290 workflows.

The typed projection and writer target the public buildingSMART MMC 2.0.0 schema shape. This crate does not claim complete conformance with every DIN 18290-1 edition, and validate() is a structural/referential check rather than a complete XSD validator.

use openbim_mmc::MmcArchive;

let bytes = std::fs::read("exchange.mmc")?;
let archive = MmcArchive::parse(&bytes)?;
assert_eq!(archive.container().metadata.format_version, "2.0.0");
assert!(archive.validate().is_valid());
# Ok::<(), Box<dyn std::error::Error>>(())

The crate provides:

bounded ZIP ingestion and decompression-ratio limits;
exact root MultiModel.xml handling;
namespace-aware MMC and LinkModel typed projections;
opaque application resources with original-byte access;
exact original-archive access plus deterministic entry-byte-preserving re-emission;
extraction that rejects unsafe names, symlinks, collisions, and overwrites;
stable validation codes for structural and referential-integrity findings.

original_bytes() is the byte-identical no-op path. Deterministic reconstruction preserves uncompressed entry content, including unknown entries and source XML, but does not promise identical ZIP compression streams or metadata.

openbim-mmc intentionally does not parse IFC or GAEB payloads and does not depend on ISO 21597 ICDD. DIN 18290 Parts 2–4 are domain profiles above this crate.

The unprefixed crates.io name mmc belongs to an unrelated project. No alias package is provided.

Rust 1.88.0 is the supported baseline. License: AGPL-3.0-or-later. Normative standards and schemas are not included in the package.

openbim-mmc 0.1.0

openbim-mmc