Does the term File Specification, AKA Spec, have a pedigree?

General
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In using absolute_file_name/3 and user:file_search_path/2 (ref) on a regular basis was looking for some official references for File Specification but the most official document I find from Googling is

https://wiki.vmssoftware.com/File_specification

While VMS is a respectable reference, it is an isolated set of documentation from what I see and not part of a pedigree leading to a more official definition.

I was hoping for something more official or something from Wikipedia that would lead to something more official but there is no specific Wikipedia (https://www.wikipedia.org/) entry.

For the similar Uniform Resource Identifier (URI) there is

Does any one know of an official document for File Specification that applies to computers in general or is this one of those terms that has a fairly well established meaning that it never really needed an official standard?

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As far as the ISO Prolog standard is concerned, a file as used by e.g., open/3 is a ground term (AFAIK). Practically every Prolog system implements this as an atom that denotes a file name as is used by the operating system, possibly with some abstraction to improve portability.

SWI-Prolog absolute_file_name/3 finds its origin in Quintus Prolog. It allows specifying search paths and using these as Path(File). In SWI-Prolog, unlike Quintus and most other systems, File in Path(File) can be a term Segment1/Segment2/…

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