The Roman Missal, Third Edition does not replicate exactly previous editions of the Sacramentary. There are both new and revised items in this new edition. There is also some reorganization: the Prefaces are not all collected in one place, the table of contents is moved to the back of the book, Masses for Various Needs and Occasions are collapsed to three headings, etc.
The intent of NAVIGATING THE ROMAN MISSAL, THIRD EDITION is to make it easier for the end user to find the needed texts and get to the correct place each day. It began as a series of periodic handouts produced by the member dioceses of the Federation of Diocesan Liturgical Commissions of Region 7 (Illinois and Indiana). It was posted on the national FDLC website as well as shared in various ways and with various organizations.
The first item is a compilation of the 12 separate items in one 35-page booklet. The individual items follow in order, season by season.