[DOC-FIX] Document models:/ URIs explicitly in OSS MLflow docs

Willingness to contribute

No. I cannot contribute a documentation fix at this time.

URL(s) with the issue

https://mlflow.org/docs/latest/tracking.html#artifact-stores

Description of proposal (what needs changing)

I wanted to link to what an “MLflow model URI” could be in a design doc, and searched for it in MLflow docs. It looks like we don’t actually describe supported model URIs except in CLI docs which say

Required URI to the model. A local path, a 'runs:/' URI, or a remote storage URI (e.g., an 's3://' URI). For more information about supported remote URIs for model artifacts, see https://mlflow.org/docs/latest/tracking.html#artifact-stores

However the linked artifacts doc page doesn’t say anything about models:/ URIs. Currently, it looks like we document models:/ URIs in the model registry page: https://mlflow.org/docs/latest/model-registry.html#fetching-an-mlflow-model-from-the-model-registry.

To address this, one idea is to document model registry models:/ artifact storage and runs:/ artifact storage in https://mlflow.org/docs/latest/tracking.html#artifact-stores. We could also add a more explicit section documenting models:/ URIs in the model registry doc page and link to it from the tracking page

[dbczumar]

@Nikhil-Mudgal I agree, the second solution is better. The following section of the contributing guide should help: https://github.com/mlflow/mlflow/blob/master/CONTRIBUTING.rst#writing-docs

[Nikhil-Mudgal]

Thanks @dbczumar. As per the OP’s request where he has proposed 2 solutions to the issue. Carrying out the 2nd one will surely be better as we will be giving providing an explicit section for models:/ URI in the model registry doc page itself and a link to it from Model Tracking page too. Should i go ahead with that? And can you please provide me link on how to setup the required environment for documentation, it will be great as a headstart?