Denotation is about reference and semantics, referentially conceived. Semiotics is about sense and pragmatics, inferentially conceived.

Domain driven design is informal and adhoc, i.e. coloquial and context specific.

ad hoc Latin phrase, “to this, with respect to this, for this (specific purpose),” from ad “to” (see ad-) + hoc, neuter accusative of hic “this.” Hence, “appointed or enacted for some particular purpose” (1879). (etymonline)