tpt-doc

The Enterprise Document & Data Substrate — high-assurance, pure-Rust, spec-compliant document generation and parsing for civic and enterprise platforms.

No shelling out to Python or Java. No C-FFI. No bloated dependency trees. 100% MIT/Apache-2.0 compatible.

Crates

Crate	Description	Docs	Changelog
tpt-doc-core	Shared traits, zero-copy buffers, unified errors		CHANGELOG
tpt-doc-spreadsheet	Streaming .xlsx (OOXML) and .csv parsing/generation		CHANGELOG
tpt-doc-fhir	HL7 FHIR R5 typed parsing, validation, and serialization		CHANGELOG
tpt-doc-edi	EDIFACT and X12 parsing with schema validation		CHANGELOG
tpt-doc-hl7v2	Streaming HL7 v2.x message parser and encoder		CHANGELOG
tpt-doc-pdf	Pure-Rust PDF 1.7/2.0 generation and parsing		CHANGELOG
tpt-doc-sign	Cryptographic document signing (PAdES, XAdES, CAdES)		CHANGELOG
tpt-doc-layout	Headless HTML/CSS-to-PDF layout engine		CHANGELOG
tpt-doc-word	Pure-Rust .docx (OOXML Word) generation and parsing		CHANGELOG
tpt-doc-ubl	UBL 2.1/2.3 and PEPPOL BIS Billing 3.0 e-invoicing		CHANGELOG

Prefer a single dependency? tpt-doc re-exports every crate behind per-format feature flags (features = ["fhir", "hl7v2"], or full).

Converters: tpt-doc-convert turns HL7 v2 ADT/ORU messages into FHIR R5 bundles.

Command line: tpt sniffs, inspects, validates and renders documents (tpt validate invoice.xml --json).

Each crate ships its own README with compiled examples and its own CHANGELOG.

Quick Start

[dependencies]
tpt-doc-fhir = "0.1"
tpt-doc-sign = "0.1"
ring = "0.17"          # supplies SecureRandom for signing

use ring::rand::SystemRandom;
use tpt_doc_fhir::prelude::*;
use tpt_doc_sign::{cades, pem, PrivateKey};

// Build a strictly typed FHIR Patient resource. `build()` only exists once
// every mandatory field is set, so an incomplete patient will not compile.
let patient = Patient::builder()
    .id("nz-12345")
    .name(HumanName::new("Smith", "John"))
    .build();

// Serialize to compliant FHIR JSON.
let json_bytes = patient.to_json()?;
assert!(String::from_utf8_lossy(&json_bytes).contains(r#""resourceType": "Patient""#));

// Detached CAdES signature over those bytes, for HIPC 2020 audit trails.
let key = PrivateKey::from_pem(&include_bytes!("key.pem")?)?;
let cert_der = pem::pem_to_der(&include_bytes!("cert.pem")?)?;
let signature =
    cades::sign_detached(&json_bytes, &key, &cert_der, &SystemRandom::new())?;
assert!(!signature.is_empty());

# Ok::<(), Box<dyn std::error::Error>>(())

See the per-crate READMEs for more examples; every one of them is compiled and run as a doctest in CI.

Compliance Targets

• NZISM — New Zealand Information Security Manual
• HL7 FHIR R5 — Fast Healthcare Interoperability Resources
• HIPC 2020 — Health Information Privacy Code

Development Roadmap

• Phase 1 (Months 1–2): tpt-doc-core + tpt-doc-spreadsheet
• Phase 2 (Months 3–4): tpt-doc-fhir + tpt-doc-edi
• Phase 3 (Months 5–6): tpt-doc-pdf + tpt-doc-sign + tpt-doc-layout

License

Licensed under either of:

• MIT License
• Apache License, Version 2.0

at your option.

Copyright (c) 2026 TPT Solutions