It is advised to get the highest version number. I do not really
do version management for this, but the footer will provide some
hints. Also I do not override version (i hope) so you can check
dates.

The HarrieSyncSource is able to do all mime-types, but does
not do any conversion between mime-types and thus may have
interoperability problems.

The DemoSyncSource is able to store the items in a JDBC-compliant
DataBase. This can be all mime-types, but no conversion is done
and the item is in size limited to the DB column.

The Calendar related syncsources that do conversion are NOT
to be used for contacts that does not WORK!! These SyncSources
also do not do the multi user ascpect as done with the
HarrieSyncSource.

For problems with the SyncSource contact "harrie AT lisanza dot net"
and do not bother others with your questions. ;-) However, do not
contact Harrie for personal tutorials on Sync4j, youmay always
pay me as consultant. ;-)