Questions about NAPTR

[Karl Auer]

On Tue, 2017-09-19 at 13:56 +1000, Mark Andrews wrote:
> In message <1505734269.2518.70.camel at biplane.com.au>, Karl Auer
> writes:
> > And is it true that "if the Regexp field is not empty, the
> > Replacement field will not be used"?
> With the current flags no but who know what will happen in the
> future.

Not sure what "no" means. My fault for putting up a statement with two
negatives.

It seems to me that the output from a NAPTR is EITHER the result of
applying a regexp to the left-hand side domain name, OR the value of
the replacement field. I.e., they are mutually exclusive. So if the
regexp is empty, the replacement is used verbatim. If the regexp is NOT
empty, the replacement is ignored (but still has to conform to domain
name syntax, hence the need for a dot).

Is that understanding correct?

Thanks, K.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Karl Auer (kauer at biplane.com.au)
http://www.biplane.com.au/kauer
http://twitter.com/kauer389

GPG fingerprint: A52E F6B9 708B 51C4 85E6 1634 0571 ADF9 3C1C 6A3A
Old fingerprint: E00D 64ED 9C6A 8605 21E0 0ED0 EE64 2BEE CBCB C38B