Listening to renditions of Vivaldi's Concerto in D Major, Op 10 No 3, Second Movement - Cantabile, it seems that when it's played as solo piece, the repeats include ornaments that are not in the score. In a recording by Sir James Galway of the entire concerto, there was none of this ornamentation on the repeats.
So, my questions are: Is there a tradition about this? Are the ornaments individual to each player? Is there a written set of standards?
Pahud plays the Cantabile:Galway plays the Concerto (Cantabilie/Largo) begins at 3:55.