The HIERONIMO Dictionary

so

Definition:
An expression of acknowledgement that X has made a point.(Crystal and Crystal 2008)

Category:
Discourse marker - Interlocutor's response

Examples:

1

So; but I wonder then some great men scape
This banishment; there’s Paulo Giordano Orsini
[Webster WD Brennan EMOTHE] Loc: 1.1

Who speaks: Lodovico.
To whom: Gasparo.

Translations:

2

So, have you done?
[Webster WD Brennan EMOTHE] Loc: 1.2

Who speaks: Flamineo.
To whom: Cornellia.
Observation:
Discourse marker: within Y´s response: An acknowledgement that X has made a point
(okay, that´s it ) An expression of unwillingness to continue with X’s topic (be off)

Translations: