tpt-io-standards

A pure-Rust, feature-gated workspace for parsing, validating, and serializing industry-standard data formats. Each format lives in its own crate under crates/, sharing a common foundation ([tpt-io-core]) so that every parser offers the same error-reporting, encoding-detection, and validation ergonomics.

Repository: https://github.com/tpt-solutions/tpt-io-standards

All parsers are implemented from scratch in pure Rust (no C/C++ FFI such as libgdal, dcmtk, or netcdf-c), keeping them cross-platform, memory-safe, and WASM-compatible. Parsers aim for zero-copy / low-allocation reading where possible, with strict schema validation and structured, byte-offset-aware errors.

Workspace layout

Crate	Format(s)	Domain
tpt-io-core	shared traits, errors, encoding & checksum utils	foundation
tpt-io-dicom	DICOM (PS3.5/6/7/10)	Medical
tpt-io-fhir	HL7 FHIR R4/R5 (JSON + XML)	Medical
tpt-io-nifti	NIfTI-1 / NIfTI-2	Medical
tpt-io-ifc	IFC 4.0 / 4.3 (STEP-PF)	Construction
tpt-io-citygml	CityGML 2.0 / 3.0	Construction
tpt-io-spice	SPICE (HSPICE/LTSpice/Ngspice/PSpice dialects)	Electronics
tpt-io-gerber	Gerber X2/X3 + Excellon	Electronics
tpt-io-edif	EDIF 2.0.0 / 4.0.0	Electronics
tpt-io-geo	GeoJSON / Shapefile / GeoTIFF	Earth & GIS
tpt-io-netcdf	NetCDF-3 / NetCDF-4 (HDF5)	Earth & GIS
tpt-io-welllog	LAS 2.0/3.0 + DLIS	Earth & GIS
tpt-io-capeopen	CAPE-OPEN 1.1 / 2.0	Process
tpt-io-sbml	SBML Level 2 / 3	Process
tpt-io	umbrella re-export of all formats	umbrella

Using the umbrella crate

Downstream Tier-2 repositories enable only the formats they need:

[dependencies]
tpt-io = { version = "0.1", features = ["dicom", "ifc"] }

Compiling tpt-io with no features is a true zero-cost crate that only re-exports [tpt-io-core]. The feature tree is intentionally flat (no transitive feature dependencies) to avoid Cargo feature-unification surprises.

Individual format crates can also be depended on directly:

[dependencies]
tpt-io-dicom = "0.1"

Feature flags on tpt-io-core

Feature	Default	Effect
std	yes	std-only conveniences (e.g. std::io adapters)
alloc	no	alloc-based types without std
checksums	no	CRC32 / MD5 / SHA256 helpers

Design principles

• Structured errors — every parse error carries the byte offset, the expected-vs-actual token, a reference into the format specification, and a slice of surrounding bytes (see tpt_io_core::ParseError).
• Two-phase validation — syntactic (is it structurally valid?) and semantic (does it make sense?) checks, split via Validator and toggleable with with_syntactic_validation / with_semantic_validation.
• Zero-copy where possible — parsers prefer &str / &[u8] slices into the input buffer and support streaming for very large files.
• Extensible — the FormatExtension trait lets users add custom tags or dialects without forking a crate.

MSRV policy

The minimum supported Rust version (MSRV) is 1.75, declared in [workspace.package] (rust-version). Crates must therefore target edition 2021. We will only raise the MSRV in a minor (or major) release, and the bump will be called out in the changelog. CI always builds against the pinned rust-version in addition to stable.

Building & testing

cargo build --workspace
cargo test  --workspace
cargo test  --workspace --all-features
cargo clippy --workspace --all-targets --all-features
cargo fmt   --all -- --check

License

Licensed under either of MIT or Apache-2.0 at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you shall be dual licensed as above, without any additional terms or conditions.