I think that this probably should be a different thread, but using modifiers such as "mainstream" and similar, is excellent with a word that is as broad as "literature".
"Oral literature" is an oxymoron that is only used by people who don't think about what they say.
Homer's poems were in the oral tradition, but they also became literature when they were written down.
I am not familiar with the Pali Canon. If it is oral, then it is not literature. If it has been written down, then it is literature.
That is the problem with abridged dictionaries; they are not complete. I would suggest that you look at an unabridged dictionary that is more likely to have a complete definition.
People in this forum clearly are interested in thorough definitions, rather than incomplete of definitions. I am a reader of non-fiction as well as fiction, and apparently you want to restrict literature to fiction. In this forum literature is usually taken to mean that which has been written, and it is usually discussed as literature with some modifier.Quote:
I admit I quoted a reduced definition, the one most approriate to what people in this forum are actually interested in. Your "formal" definition is also limited, and more, is off the point. And who cares about "directions for using a machine, marketing literature, ..." That's obviously not the sense in which "literature" is used in this forum.
If you wish to discuss, then discuss fiction. If you wish to discuss print advertisements, then discuss them; they are literature.

