[mythtv] Question about program table

[Torbjörn Jansson]

I just wanted to confirm if i have understood the fields in the program
table right.

previouslyshown is prety obvious, but when it's true, the orginalairdate
specifies the date it was last shown, right?
And airdate is the year of the movie, kind of like production year or
something?

And parttotal/partnumber is the episode or part number, so if i have the
first episode of a tv series partnumber woud be 1 and parttotal the total
number of episodes or null if it's unknown?
Or does it start counting from zero?

What is syndicatedepisodenumber and how is that related to
parttotal/partnumber ?