version_number()
Create a version number
as_version_number()
Coerce to a version number
bump_version()
Bump a Version Number
is_version_number()
Test if an object is a version number
version_part()
Get a Version Number Part
`%==%`
Check for rough equality between version numbers
tabulate_versions()
Tabulate version numbers
search_versions()
Search a Set of Version Numbers