Thom Brown <thom@linux.com> writes:
> None of those others perform such a role. Instead they add additional
> functionality intended to be utilised as part of general data usage,
> adding new types, operators, query functions etc. Maybe the term
> "core" is inappropriate. Instead we might wish to refer to them as
> "utility extensions" or something like that, although that may be just
> as vague.
The term “core” here intends to show off that those extensions are
maintained by the core PostgreSQL developer team. If needs be, those
extensions will get updated in minor releases (crash, bugs, security,
etc).
Regards,
--
Dimitri Fontaine
http://2ndQuadrant.fr PostgreSQL : Expertise, Formation et Support