1- First, what kind of different storages the Caldav RFC accepts? I
was not able to retrieve this information, because lot of people
seem confused between these four words: notes, memos, tasks and
todo.
2- Second, SyncEvolution support two different backends for the
things I understand to be the same concept, and give this
description in the documentation:
memo: plain text notes
todo: task list
So what is the difference between memo and todo? ownCloud and
Thunderbird Lightning seem to call "task" the todo concept, and I've
never seen a "memo" implemented.