The core responsibility of the versification package is to understand verse references. It standardizes on OSIS book names and on a KJV versification. Each book in the KJV is numbered sequentially and each verse of the KJV is numbered sequentially.

The primary abilities of this package are to flexibly understand Bible book names as might be found in a reference work or supplied by a user, to convert between these and OSIS book names and KJV book number.

One can also request information concerning books of the Bible: The number of chapters or verses in a book, the number of verses in a particular chapter, the ordinal position of a verse in the KJV and so forth.