We have a Geodatabase containing an obj class (main table) which has subtypes and these contain domains.
Need a way (scripting) to get those subtypes & domains in a "readable" table.
You could use Domain To Table (Data Management Tools - Domains) and batch the jobs to export all the domains. Not sure about how to export Subtypes though.
If it is python code you are looking for you could have a look at:
Get coded-value descriptions when accessing data with cursors | ArcPy Café
... and this thread: Batch export coded value domains to table
There are some remarks included in this document: Some Python Snippets
... and the help provides samples on subtypes and domains: