Title Prefix is separated from Title Without Prefix to assist alphabetical sorting of Titles. Titles are sorted by Title Without Prefix, followed by the Subtitle.
The Main Title of a Work or part of a Work, not including the Title Prefix.
For example, 'Life and Adventures of Robinson Crusoe'. Use Title Case: the first letter of the Title Without Prefix is always a capital or Upper Case letter, as well as the first letter all words other than definite and indefinite articles (e.g. 'the' and 'a'), conjunctions (e.g. 'and'), and prepositions (e.g. 'in', 'of' etc.).