[feedback request] Add variable level metadata

[OriolAbril]

ArviZ should store metadata at the variable level in order to take advantage of it and automate things better.

Context

We should use this issue to discuss what metadata is relevant and once we have a clear idea of what would be interesting to support, start thinking about implementations to make that a reality. For now let's refrain from discussing implementation details as much as possible.

This is relevant to inferencedata, if we want data and analysis to be decoupled we need to make sure if metadata is used, it is added from any language in the same way. Should we move this to arviz_governance or something of the sort? cc @sethaxen

Ideas

• Variable type
  • continuous
  • discrete
  • circular
  • time?
  • categorical
  • boolean
  • imaginary/complex
• variable constraints
  • bounds, which could be:
    • constant
    • vectorized (in multidimensional variables only)
    • dependent on other variables?

should transforms also be considered metadata?

[soma2000-lang]

Can I work on this issues@OriolAbril

[OriolAbril]

Hi @soma2000-lang, thanks for showing interest in ArviZ and commenting to find a suitable issue to work on. This issue is still at a very early discussion stage and can't be worked on yet (by anyone,, I can't work on it yet either).

If you tell me what is you background and interests I can try to point you to an issue you can work on.

[soma2000-lang]

I am a 3rd year BTech student at Iem Kolkata.I am proficient in python and machine learning and want to contribute in these domains.I am an regular open source contributor and have participated in open source program's

[OriolAbril]

I would suggest getting started with something like #1225 for example, so you get familiar with our workflow and testing. The feature itself should not require a lot of code lines but it will require testing and documenting.

Then you can move to something like #1318 (if interested in speeding up python) or #1242 (if more interested in plotting instead)

[soma2000-lang]

Ok sure@OriolAbril