olemus
teostuse alusvariant, millest võidakse tuletada muid teostusi
= the implementation baseline from which other implementations may be derived

näiteid
Wiktionary:
a piece of software that implements a specification of requirements and whose main purpose is to help in the creation of other software implementations of the specification by serving as a point of reference rather than being put to directly productive use

NISTIR 8074:
the implementation of a standard to be used as a definitive interpretation for the requirements in that standard
Reference implementations can serve many purposes. They can be used to verify that the standard is implementable, validate conformance test tools, and support interoperability testing among other implementations. A reference implementation may or may not have the quality of a commercial product or service that implements the standard.

ülevaateid
https://www.lawinsider.com/dictionary/reference-implementation

https://en.wikipedia.org/wiki/Reference_implementation