In message
, Jeffrey Walton writes:
> > plugh.example TXT "foo" "bar"
> >
> Thanks John.
>
> So I'm clear: (1) there is only one TXT record per host;
No.
> (2) multiple TXT records are not allowed;
No.
and (3) the individual character strings are delimited with the quote
character.
Yes and no.
> Related: is there an escape character so a quote can be present in the
> character-string?
Yes, back slash.
> Related: is the single quote also accetped? What happens if the string
> is "Knuth said, 'random numbers should not be generated with a method
> chosen at random.'"
>
> Finally, is there a standard document that calls the convention out?
Yes. RFC 1035 Section 5.1. Format.
is expressed in one or two ways: as a contiguous set
of characters without interior spaces, or as a string beginning with a "
and ending with a ". Inside a " delimited string any character can
occur, except for a " itself, which must be quoted using \ (back slash).
Which is combined with the following to allow any 8 bit character
and to allow back slash to exist in a character-string. Note the
escape conventions are not the same a in C.
\X where X is any character other than a digit (0-9), is
used to quote that character so that its special meaning
does not apply. For example, "\." can be used to place
a dot character in a label.
\DDDwhere each D is a digit is the octet corresponding to
the decimal number described by DDD. The resulting
octet is assumed to be text and is not checked for
special meaning.
Mark
> Please forgive my ignorance, and sorry about all the details. I have
> not been able to find a detailed specification.
>
> Jeff
>
>
> On Sat, Oct 12, 2013 at 12:52 AM, John Levine wrote:
> >>How, precisely, is the second (or third) string added?
> >
> > plugh.example TXT "foo" "bar"
> >
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