[sqlite] primary key and physical data organization

[Martin Pfeifle]

Hi,
Assume I have a table containing an integer primary key. As far as I know, this 
value is identical to the ROWID, right?
How does SQLite organize the data within the file?
Does it try to organize the data on the pages according to the primary key 
(=ROWID) or according to the insertion order of the records?
Can anyone explain that to me?
Best Martin