In the current third edition the scholar finds a list, which is as exhaustive as possible, of all the Christian Latin texts from Tertullian in the 2nd century to Bede, who died in 735. Each work, each sermon, each letter, each poem is properly identified in the 2,348 entries, many of which are further subdivided into numerous subsections: the best editions are noted, as are the means to improve them, the newly-found manscripts, the studies on the textual transmission or on the language, and so on.
An expanded body of Concordances is provided. These provide correspondences between the Clavis numbers and the numbering or pagination of seventeen collections or lists of Latin writings. The Clavis numbering is of course the basis for the publishing programme of the Corpus Christianorum Series Latina and more recently serves as a crucial reference tool in the electronic Library of Latin Texts (CLCLT).