Perhaps you know of secondary literature concerning the use of so-called paribhāṣās, or interpretive rules by any name, in dharmaśāstra particularly. Of course P. V. Kane has laid the ground in Chapter XXX of History of Dharmaśāstra, volume 5.

I am also interested in explicit mentions of the word 'paribhāṣā' in works of dharmaśāstra. I've already unearthed a few by searching the texts on GRETIL.

I would be honored and delighted to receive your advice and suggestions.