Every post have an attribute called Post Type, it has two values, public and private, and the default value is private. This attribute is used to control the read rights of the post.

• If current system is an Application Help System,
  Public post means it can be viewed by everyone.
  Private post means it can only be viewed by the user who has been authorized as an admin in the independent application or the login user in current help system.

• If current system is a Knowledge Based System,
  Public post means it can be viewed by everyone, no matter if current user comes from external network or internal network.
  Private post means it can only be viewed by user who comes from internal network or the login user in current help system.Notice: Internal or external network depends on where is the help system installed,  usually it is installed in the company’s local network, so if the user request come from company’s local network, will be consider as an internal network request.