Code 25, Industrial 2 of 5 and IATA 2 of 5 — format provenance and usability
=============================================================================

This file records the engineering provenance and redistribution boundary for
the Code 25 family implemented by Sythos Barcode Universal.

It is an engineering inventory, not legal advice. Patent, copyright and
trademark conclusions still need independent review for the jurisdiction and
the intended product. Items marked [TO VERIFY] remain open questions.


FORMAT AND IMPLEMENTATION BASIS
-------------------------------

Code 25 (often called Standard 2 of 5) and Industrial 2 of 5 use one numeric
digit grammar: ten alternating bar/space elements with exactly two wide bars.
The Industrial 2 of 5 frame is the canonical Code 25 frame in this SDK. IATA 2
of 5 uses the same digit grammar with its shorter start/stop frame. The API
keeps all three names explicit and supports an opt-in modulo-10 check digit.

The run-width descriptions are represented as original Sythos data and
expanded algorithmically for the selected wide-bar ratio. The reader validates
the full start/data/stop structure, quiet-zone boundary and optional check
digit before returning a value. No third-party source code, lookup table or
binary asset is copied into this repository.

The runtime is original Sythos TypeScript with generated JavaScript output and
is distributed under the MIT License. The format names are descriptive and do
not imply certification by an industrial, logistics or aviation organisation.


PATENT AND TRADEMARK REVIEW
---------------------------

Historical Code 25 patent families, jurisdiction-specific licensing statements
and current registrations for the family names have not been independently
cleared here. [TO VERIFY] This project makes no unconditional patent-free,
public-domain or trademark-clearance claim.


INDEPENDENT VALIDATION BOUNDARY
-------------------------------

BWIPP/bwip-js was used only as a local, independent black-box oracle to compare
Code 25, Industrial 2 of 5 and IATA 2 of 5 renderings. It was used solely for
verification and counter-checking of which published format behaviour could be
used in comparable conditions. Its source, tables and runtime are not copied
into or shipped by this SDK, and it is not a runtime dependency. The comparison
is an engineering check, not a legal opinion or a conformance certificate.


CONCLUSION
----------

The original Sythos Code 25-family implementation is MIT-licensed. If a rights
holder or user identifies a conflicting notice about the available material,
please open a GitHub issue with the reference so it can be reviewed and
recorded.