The following possible features of a text are not transcribed by the WWP. When we indicate their omitted presence, we do so using the <gap> element.
Omission indicated with <gap>:
modern handwriting which appears on the original book, including that of an editor, librarian, etc.
library call numbers
Silent omission (no <gap> tag needed):
modern handwriting that appears only on our xerox (that is, handwriting which does not appear on the original book).
printed library seals
words or images embossed on the paper; e.g. the seal of the library
smudges, foxing, dead insects, or other non-textual, non-image marks