TXT Record Format with multiple records?

[Jeffrey Walton]

I want to add two unique strings for my domain in a TXT record (I
currently have one message, but I need a second, distinct message).
According to RFC 1035, 3.3.14 (page 20):

**********
3.3.14. TXT RDATA format


    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    /                   TXT-DATA                    /
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

where:

TXT-DATA        One or more <character-string>s.

TXT RRs are used to hold descriptive text.  The semantics of the text
depends on the domain where it is found.
**********

How, precisely, is the second (or third) string added? Is it a single
TXT record with multiple messages (character-strings)? If so, what
is/are the delimiters for TXT-DATA?

Or do I add a second (or third) TXT record? Are multiple TXT records
even allowed?

Jeff