Software licence

What is covered by what

The engine: Apache 2.0

The reference implementation is licensed under the Apache License, Version 2.0. That is a permissive licence, and it means you may:

• Run it for any purpose, personal or commercial, with no user limit and no licence fee.
• Modify it, and keep your modifications private if you want to.
• Redistribute it, including inside a closed source product you sell.
• Use the patents we contribute, under the express grant in section 3 of the licence.

The conditions are light: keep the copyright and licence notices, state what you changed, and do not use our names to endorse your fork. The full text governs, and this summary does not modify it.

The format: open spec

A file format cannot be locked up by the tool that writes it, and we do not want this one to be. The .dai layout is documented so that anyone can write a reader or a writer without asking us, paying us, or joining anything.

This matters more than the engine licence. If we disappear tomorrow, your files remain plain text on your disk in a documented format, readable by a program somebody else can write. That is the whole point of the product, and a licence that undermined it would undermine the product.

Getting the source

The repository is public, under Apache 2.0, at github.com/Kerneta/daidocs. Everything described here can be read, cloned and checked rather than taken on trust, which is the only way an open source claim means anything.

The LICENSE file at the root governs. Where this page and that file could be read differently, the file wins.

Trade marks

Apache 2.0 grants copyright and patent rights, and expressly does not grant trade mark rights. "Kerneta", "daidocs", the Kerneta mark and the site's visual design are ours and are not covered by the software licence.

You may use the names factually, to say that your product reads .dai files, or that it is built on the Kerneta engine. You may not use them as your own product name, in your logo or domain, or in any way suggesting we endorse or supply what you are selling. If you are unsure, ask, and we will usually say yes.

The hosted service

Running the engine yourself needs no agreement with us beyond Apache 2.0. Using our servers to do it is a service, governed by the terms of service and the privacy notice.

The two routes are genuinely independent. If the hosted terms do not suit you, self host and the only agreement between us is a permissive open source licence you never have to click.

Warranty and liability

Under Apache 2.0 the software is provided on an "AS IS" basis, without warranties or conditions of any kind, express or implied, and we are not liable for damages arising from your use of it. Sections 7 and 8 of the licence set this out in full and they govern.

In practice: test it on your own data before you depend on it, keep the originals, and note that the engine writes byte exact copies to _raw/ before extraction precisely so that a bad conversion is recoverable. Nothing in this paragraph limits liability that cannot lawfully be limited, and if you are a consumer your statutory rights are unaffected.

Third party components

The engine and this website include third party open source components under their own licences, each reproduced with the component. The typefaces used here are licensed under the SIL Open Font License and their licence texts ship alongside the fonts in assets/fonts/.

Contact

Licensing questions, including trade mark permission and commercial arrangements: hello@kerneta.com.

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