Descriptive bibliographers follow specific conventions and associated classification in their description. Titles and title pages are transcribed in a quasi-facsimile style and representation. Illustration, typeface, binding, paper, and all physical elements related to identifying a book follow formulaic conventions, as Bowers established in his foundational opus, "The Principles of Bibliographic Description". The thought expressed in this book expands substantively on W. W. Greg's groundbreaking theory that argued for the adoption of formal bibliographic principles (Greg 29). Fundamentally, analytical bibliography is concerned with objective, physical analysis and history of a book while descriptive bibliography employs all data that analytical bibliography furnishes and then codifies it with a view to identifying the ideal copy or form of a book that most nearly represents the printer's initial conception and intention in printing.