Liferay Group types

When I run the following sql

select distinct(type_) from Group_

I get group types 0,1,3 in my database table G开发者_Go百科roup_.

What does 0 , 1 and 3 mean, and are there any other possible values?

Got the Answer from com.liferay.portal.model.GroupConstants

TYPE_COMMUNITY_OPEN = 1,
TYPE_COMMUNITY_RESTRICTED = 2,
TYPE_COMMUNITY_PRIVATE = 3,
DEFAULT_PARENT_GROUP_ID = 0