Specifies whether objects should be created online, offline, or online where possible. If online indices are to be created, ...

Specifies whether objects should be created online, offline, or online where possible. If online indices are to be created, the tag "ONLINE=ON" will be appended to the DDL script for all objects that can or should be created online. 
Available options (select one):
OFF - offline only
MIXED - online where possible
ON - online only
Offline is the default.