A preface is a short introductory section written by the author of a book or published work, positioned at the beginning of the text before the main body. It states the author's purpose for writing, the scope and intended audience of the work, and may explain the methodology, origins, or circumstances of its creation.
Parameters: (1) The author must be the work's primary writer or writing team — this distinguishes a preface from a foreword, which is authored by a different person. (2) The content must concern the work itself: its aims, methods, scope, or production history. (3) It is situated at the front matter of the published artifact, preceding the main text. (4) Its length is typically brief relative to the work as a whole, serving orientation rather than substantive argument.
Persistence mechanism: The preface is embedded in the published text and reproduced identically with each copy of the work; it persists as a fixed structural element of the artifact across all editions that retain it (superseded only by a revised edition that replaces it).
[formal: praefatio | substrate: mind | horizon: a life | explicit: yes | epoch: 0.01]