udsdoc

AUTOSAR DCM/CanTp/DEM ARXML → UDS (ISO 14229) specification documents (LaTeX → PDF) and ASAM ODX 2.2 / PDX (ISO 22901-1).

udsdoc turns AUTOSAR diagnostic ARXML into a complete UDS specification and into ODX/PDX for diagnostic tooling. It offers two front-ends over the same pipeline: a GUI (local browser app) and a CLI (headless, CI/HPC-friendly).

Install

pip install udsdoc          # CLI core (LaTeX / Markdown / RST / ODX / PDX)
pip install udsdoc[web]     # GUI  (udsdoc --serve)
pip install udsdoc[all]     # everything (GUI + LLM verify + ECU testing)

PDF output needs a LaTeX distribution with xelatex (TeX Live / MiKTeX). No pip on the target machine? Grab the self-contained udsdoc.pyz from Releases — it runs with just a Python interpreter (python3 udsdoc.pyz input.arxml -o spec.tex).

GUI version

udsdoc --serve            # opens http://127.0.0.1:8765

The no-install static browser edition also generates LaTeX/PDX and performs local compliance analysis entirely in the tab. Its Pyodide runtime, Python wheels, WebLLM runtime, and odx-rs WASM are self-hosted and available offline after the first successful load.

For matrix-only SRA/SWA work, the CpM CSV files remain the primary input. The browser edition can optionally take the summary workbook as an answer/reference for the supported SID, DID, RID and DTC surface. It reconciles the CpM-derived surface before generating TeX/PDX; it does not render the workbook itself as a specification.

With an SRA reference, this produces two peer ECU variants (System1 and System2) because SRA is a dual-uC system. IDs whose answer-sheet row has no per-uC allocation are explicitly treated as shared; no routing or gateway is invented. With an SWA reference, output remains a single-uC specification.

Inputs — on the Generate tab, pick a BSW repository folder (or a built-in sample). It auto-discovers the ARXML (Dcm / CanTp / Dem) and the C sources; attach an optional Compliance Matrix CSV (+ a sources YAML) for a requirements-compliance chapter.
Outputs — Generate & Download a LaTeX ZIP that includes a compiled spec.pdf (Tex → PDF), or Export ODX / PDX for CANalyzer / CANoe.
LLM — the LLM tab connects the provider used by Verify Conditionally-Accepted comments: Claude (browser sign-in), ChatGPT / Gemini (paste an API key — the button opens the key page for you), or local Ollama (pick or install an open-source model). Credentials are stored locally under ~/.udsdoc/.

CLI version

# ARXML in → LaTeX + compiled PDF out
udsdoc dcm.arxml cantp.arxml --dem dem.arxml --pdf -o spec.tex

# auto-discover a whole BSW repo (ARXML + C sources)
udsdoc --repo /path/to/bsw-project --pdf -o spec.tex

# DID / RID C sources for variable cross-referencing
udsdoc dcm.arxml --c-source did.c --c-source rid.c -o spec.tex

# Compliance Matrix + verify the concluded OEM↔supplier dialogue vs. the
# implementation, emit ISO 22901-1 PDX
udsdoc dcm.arxml --dem dem.arxml \
  --compliance-matrix matrix.csv --verify --verify-mini \
  --format pdx -o out/spec

Inputs — ARXML as positional arguments (+ --dem), or a whole repository via --repo; C sources via --c-source; requirements via --compliance-matrix (+ --compliance-matrix-sources). The matrix loader accepts the classic req_id/description/source_ref/traces_to contract and real-world OEM/DOORS exports (ID / ObjectType_<proj> / … / CONTENT / AcceptanceState_<proj> / CommentToCustomer_<proj> / Comment_Customer_<proj> / Final_Agreement_Status) — the per-project header tag (_ZFLSRM, …) is stripped automatically, heading/information rows are skipped, and Final_Agreement_Status is honored as the negotiation state (see the compliance_matrix module docstring for the full mapping).
Outputs — --format pdf / --pdf (Tex → PDF), --format pdx (ISO 22901-1 PDX; also tex, tex-zip — the structured multi-file LaTeX project as a ZIP — html, md, rst, odx). Exit codes: 0 ok / 1 runtime error / 2 usage error / 3 quality gate (--verify-strict, --validate, --odx-strict).

Python API:

from udsdoc import ArxmlParser, TexGenerator

spec = ArxmlParser().parse_multi(["dcm.arxml", "cantp.arxml"])
TexGenerator().generate(spec, "spec.tex")

Compliance verification

Verification is a local-first evidence pipeline:

--verify runs deterministic status, trace, numeric, access, and lexical checks with no network access.
--verify-mini adds the opt-in, dependency-free udsdoc-mini-semantic-v1 tier. It uses issue-scoped dialogue chronology, exact parsed-spec evidence, and mandatory abstention.
--verify-llm sends only the unresolved residue to the configured model.

Missing SID/DID/RID/DTC/session/security traces can be inferred from explicitly anchored English or Japanese text. Bare hexadecimal values are ignored, and every inferred trace retains confidence and source evidence. The frozen 90-row compact-model benchmark measures 64.4% coverage, 91.4% accuracy on covered rows, 80.0% deviation precision, and 40.0% deviation recall. The low recall is why uncertain remains a first-class review outcome.

The Verify feature (does the concluded OEM↔supplier dialogue match the implementation?) works with Anthropic (Claude), any OpenAI-compatible endpoint (OpenAI, Gemini's OpenAI-compatible API, OpenRouter, …) or local Ollama. Configure it once, whichever way suits you:

GUI — the LLM tab: sign in with Claude, paste a ChatGPT / Gemini key, or pick an Ollama model.
Env vars — UDSDOC_LLM_PROVIDER, UDSDOC_LLM_MODEL, UDSDOC_LLM_BASE_URL, UDSDOC_LLM_API_KEY (or a provider-native key such as ANTHROPIC_API_KEY / OPENAI_API_KEY / GEMINI_API_KEY).
CLI flags — --llm-provider, --llm-model, --llm-base-url, --llm-api-key, or --llm-config <file>.
Config file — ~/.udsdoc/llm.json ({"provider", "model", "base_url", "api_key", "timeout"}).

The static browser edition does not expose remote API-key providers. It can send uncertain rows to Ollama at the fixed loopback endpoint 127.0.0.1:11434, or run a consent-loaded WebLLM model in the browser. Model weights are not bundled. See the local-AI architecture and privacy contract for data-flow, offline, grounding, and reproducible benchmark details.

License

MIT

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