Problem domain

A problem domain is a domain where the parameters defining the boundaries of the domain and sufficient mappings into a set of ranges including itself are not well enough understood to provide a systematic description of the domain.

This would be a target space of meta-tools designed to explore a domain-space .

Alternately, a domain specifically defined by some extrinsic problem-system to differentiate it from the set of all domains.

See: domain theory for the mathematical discipline related to these issues.

In this context see information theory as the idea behind a domain as a minimal set of sources for mappings relative to the problem a specific instance of applying Occam's Razor.