OCLC Bib formats says to prefer a separate field for each unique term. The examples don’t cover your situation (with two terms not in any particular thesaurus) but since they specify “term” rather than vocabulary, I think OCLC is preferring 347 ## $bPDF 347 ## $bEPUB rather than one 347 with two 347s. Mike Monaco (he/him) Coordinator, Cataloging Services 261B Bierce Library The University of Akron Akron, Ohio 44325-1712 Office: 330-972-2446 [log in to unmask]<mailto:[log in to unmask]> ORCID: 0000-0001-7244-5154 From: Program for Cooperative Cataloging <[log in to unmask]> On Behalf Of Ivan E Calimano Sent: Wednesday, July 29, 2020 12:17 PM To: [log in to unmask] Subject: [PCCLIST] Use of 347 $b CAUTION: This email originated from outside of The University of Akron. Hello I have now a question about the use of $b when I have 2 encoding formats for the same bib record. So far, with no examples in the bib formats (LC or OCLC), I've been using two 347, one for each format that I have. Then I realized that $b is repeatable. So, what it is "correct" then? 347 ## $bPDF 347 ## $bEPUB OR 347 ## $bPDF$bEPUB Thanks for the guidance. Keep safe Ivan --- ============================== Iván E Calimano, PhD Head of Bibliographic Services Digitalia Inc [log in to unmask]<mailto:[log in to unmask]> 787 510 5010 ==============================