The CNTR project aspires to include the text of all witnesses which contain any portion of the New Testament up to the terminus ad quem (ending date) of 400 AD. This includes the text from inscriptions, amulets, talismans, and quotations from church fathers, written on any material (papyrus, parchment, ostraca, stone, etc.), and written in any language. Each corrector of a manuscript counts as a separate witness to the text of the New Testament, provided that the corrections occurred prior to the terminus ad quem. The CNTR transcriptions follow the normal trinary transcription standard based on the Leiden convention which differentiates the clear text from the damaged text and missing text (lacuna). These transcriptions have been checked against other electronic sources whenever possible, but in many cases were the first and/or only such electronic transcriptions available.