3 questions: 1. author parts order 2. text-case: sentence/title 3. sort citation

1. How "Einstein A." and "A. Einstein" are different in the style file? I compared style file of IEEE and nature but could not find the answer.

2. What does it mean by 'title' or 'sentence' in text-case? Any examples?

3. Why citation within text should be sorted? Any examples?
743 ## The sort element specifies the sort order for a citation or for the
744 ## bibliography. If it is not added, citations are sorted according to user
745 ## preferences, and bibliography is sorted according to order cited.
746 sort = element cs:sort { key+ }

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