Related to literature notes, but a small level down are the sorts of basic highlights that one makes in their books/reading. For pedagogy's sake they're a sort of fleeting note that might be better rewritten in a progressive summarization form. Too often they're not, but sit there on the page in a limbo between the lowest form of fleeting note and a literature note.

Hierarchy of annotations and notes: - fleeting notes - highlights - marginalia marks: ?, !, ⁕, †, ‡, ⁂, ⊙, doodles, phatic marks, tags, categories, topic headings, etc., - very brief annotations - literature notes (progressive summaries) - permanent notes

Fleeting notes are similar to the sorts of things one would have traditionally kept in a waste book.

Francesco Sacchini recommended the use of two notebooks:

“Not unlike attentive merchants... [who] keep two books, one small, the other large: the first you would call adversaria or a daybook (ephemerides), the second an account book (calendarium) and ledger (codex).” —Francesco Sacchini "Chapter 13". De ratione libros cum profectu legendi libellus. Wurzburg. p. 91. (1614).

(See also Blair, Ann M. (2004). "Note taking as an art of transmission". Critical Inquiry. 31 (1): 91. doi:10.1086/427303.)

The root word ephemeral in this context is highly suggestive of the use and function of fleeting notes.

The Latin word "ephemerides" can also be translated as "newspaper", useful for only a short period of time.

Recall also that in a general sense Cicero contrasted the short-lived memoranda of the merchant with the more carefully kept account book designed as a permanent record.

Reference: Cicero (1930). Pro Quinto Roscio comoedo oratio,"The Speeches". Translated by Freese, John Henry. Cambridge, Massachusetts. pp. 278–81.