Version 2.47 adds support for MARC21 Update No. 23, released in November, 2016).
Bibliographic format changes for Update No. 23:
http://www.loc.gov/marc/bibliographic/bdapndxg.html
Authorities format changes for Update No. 23:
http://www.loc.gov/marc/authority/adapndxf.html
Version 2.47 also includes support for the following changes to the MARC Codelists:
TECHNICAL NOTICE (November 02, 2016)