I have been unable to find a comprehensive document that describes all of the query parameters that can be used to query Open Data datasets.
There is a section of the documentation that identifies the keyword, q, and group_id parameters. By experimenting with the interface, I can find the following additional parameters
Is there any official documentation of the full set of supported query parameters for filtering the datasets?
We are currently working on full documentation for the ArcGIS Open Data API. In the meantime, we have an explorer that you can view here: ArcGIS Open Data Developer API - let us know if you have questions about it.
How are you seeking to query the datasets, specifically?
That is an excellent resource! Thank you very miuch.
I have no specific use cases, but we set up Open Data Portals for clients and I simply wanted to be educated.
Great, glad it's useful! Please let us know if there is any additional information or features you'd like to see in an API explorer like that - we can incorporate it in the explorer we are building from scratch.