Initial ACDD Tests

[abkfenris]

I wanted to share an early draft PR before implementing too many rules to make sure I'm on the right track.

The IOOS compliance checker has implemented their own tests for ACDD, CF, IOOS, and others, but have ended up with a much more complex and hard to adapt library in the process. There is interest in using XRLint to help simplify things, and make it easier to share work across the ecosystem. Along those lines an idea is to move tests/rules upstream if there is interest rather than keeping their own implementation.

I've converted many of the more general ACDD global attribute tests over here.

[forman]

@abkfenris, thank you very much and we apologize for overlooking this. We are extremely busy at the moment, which is why xrlint's maintenance has been somewhat neglected.

[abkfenris]

@forman Glad to hear that xrlint is still something you're working on.

We're still interested in implementing tests for ACDD and other conventions, but didn't want to go too far down the wrong track or sink a lot of effort into something that is no longer maintained.

[forman]

It is in active use in our company (for sure a few others), just maintenance slowed down recently. We'll be back!

[abkfenris]

Great! When I went asking around the community many folks hadn't heard about it but were very interested.