tpt-construction

Dual-licensed MIT OR Apache-2.0 · TPT Solutions

A modular Rust workspace providing reusable libraries for the construction industry: BIM/IFC, quantity takeoff, estimating, scheduling, project controls, field management, civil/earthwork, equipment telemetry, safety, documents, contracts, facility management, digital twins, and WebAssembly tooling.

tpt-construction is the construction domain layer of the TPT ecosystem, built on top of tpt-math and tpt-engineering.

Crate naming

All published crates use the tpt-c- prefix. Rust import names use underscores:

use tpt_c_core::ProjectId;
use tpt_c_ifc::IfcProject;
use tpt_c_quantities::TakeoffEngine;
use tpt_c_estimating::EstimateBuilder;

Workspace layout

tpt-construction/
├── Cargo.toml            # virtual workspace manifest
├── crates/               # tpt-c-* libraries
├── examples/             # runnable end-to-end examples
└── test-data/            # fixtures: ifc/, bcf/, las/, csv/, golden/

Crates

Layer	Crates
Foundation	tpt-c-core, tpt-c-ids, tpt-c-units, tpt-c-classification, tpt-c-model
Geometry & formats	tpt-c-geometry, tpt-c-geo, tpt-c-ifc, tpt-c-bcf, tpt-c-gltf, tpt-c-las, tpt-c-dxf
Estimating	tpt-c-quantities, tpt-c-cost, tpt-c-estimating, tpt-c-change, tpt-c-csv, tpt-c-xlsx
Scheduling & controls	tpt-c-schedule, tpt-c-risk, tpt-c-earned-value
Civil	tpt-c-earthwork, tpt-c-alignment
Field execution	tpt-c-field, tpt-c-workflow, tpt-c-documents, tpt-c-contracts, tpt-c-payapps, tpt-c-safety
Equipment & sync	tpt-c-equipment, tpt-c-sync, tpt-c-events, tpt-c-db
FM & twins	tpt-c-fm, tpt-c-assets, tpt-c-maintenance, tpt-c-twin, tpt-c-space
Web platform	tpt-c-wasm, tpt-c-api

Industry coverage

Industry Domain	Covered By
BIM / model coordination	tpt-c-ifc, tpt-c-bcf, tpt-c-gltf, tpt-c-model
Quantity takeoff	tpt-c-quantities, tpt-c-geometry, tpt-c-model
Estimating	tpt-c-cost, tpt-c-estimating, tpt-c-classification
Cost control	tpt-c-cost, tpt-c-earned-value, tpt-c-change
Scheduling	tpt-c-schedule, tpt-c-risk, tpt-c-earned-value
Field management	tpt-c-field, tpt-c-workflow, tpt-c-documents
RFIs / submittals	tpt-c-workflow, tpt-c-documents
Contracts	tpt-c-contracts, tpt-c-payapps
Payment applications	tpt-c-payapps
Safety	tpt-c-safety, tpt-c-field
Civil / earthwork	tpt-c-geo, tpt-c-earthwork, tpt-c-alignment
Survey / point clouds	tpt-c-las, tpt-c-geo
Equipment / IoT	tpt-c-equipment, tpt-c-twin
Facility management	tpt-c-fm, tpt-c-assets, tpt-c-maintenance
Digital twins	tpt-c-twin, tpt-c-equipment, tpt-c-assets
Offline field apps	tpt-c-sync, tpt-c-db
Web tooling	tpt-c-wasm, tpt-c-gltf
Reporting / exports	tpt-c-csv, tpt-c-xlsx

Design principles

• Neutral model first — file formats parse into tpt-c-model; domain engines consume tpt-c-model and never depend directly on file formats.
• Pure core crates — deterministic, testable, serializable, platform-independent; IO stays at the edges.
• Event-first auditability — important changes are representable as domain events (QuantityAdjusted, RFIAnswered, ...).
• Offline-first field support — assume poor connectivity; local storage, CRDT merge, retry queues.
• WASM as a first-class target — engines compile to wasm32-unknown-unknown.

Development

cargo fmt --check
cargo clippy --all-targets --all-features -- -D warnings
cargo test --workspace
cargo deny check licenses
cargo deny check bans
cargo deny check sources

Source file headers

Every .rs file starts with (see docs/source-file-header.txt):

// Copyright (c) TPT Solutions
// SPDX-License-Identifier: MIT OR Apache-2.0

Dependency policy

Prefer an MIT-selectable dependency chain (spec §4): MIT, MIT OR Apache-2.0, Unicode-DFS-2016, and Unicode-3.0 dependencies are allowed by default; Apache-only/BSD/ISC/Zlib require review and must be isolated behind optional Cargo features when unavoidable. Copyleft licenses are banned. Any unavoidable Apache-only dependency will be replaced with an alternative implemented from scratch where practical.

Known transitive Apache-only dependencies (carried by upstream crates):

• zopfli v0.8.3 (Apache-2.0) — transitive via zip → rust_xlsxwriter in tpt-c-xlsx
• ryu v1.0.23 (Apache-2.0 OR BSL-1.0) — transitive via csv in tpt-c-csv

License

Licensed under either of

• MIT license
• Apache License, Version 2.0

at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this repository shall be dual licensed as MIT OR Apache-2.0, without any additional terms or conditions.

Contribution License Agreement

By submitting a contribution to this repository, you agree that your
contribution is licensed under either the MIT license or the Apache
License, Version 2.0, at the option of the project maintainers and
downstream users.