reference
A collection of reference entries
refentry
A reference page (originally a UNIX man-style reference page)
refmeta
Meta-information for a reference entry
source
The name of the software product or component to which this topic applies
version
The version of the software product or component to which this topic applies
manual
The section title of the reference page (e.g., User Commands)
sectdesc
The section title of the reference page (believed synonymous with "manual" but in wide use)
software
The name of the software product or component to which this topic applies (e.g., SunOS x.y; believed synonymous with "source" but in wide use)
Identifies the kind of miscellaneous information
refmiscinfo
Meta-information for a reference entry other than the title and volume number
refnamediv
The name, purpose, and classification of a reference page
refdescriptor
A description of the topic of a reference page
refname
The name of (one of) the subject(s) of a reference page
refpurpose
A short (one sentence) synopsis of the topic of a reference page
refclass
The scope or other indication of applicability of a reference entry
refsynopsisdiv
A syntactic synopsis of the subject of the reference page
refsection
A recursive section in a refentry