Liferay Portal Architecture

Before we dive into the user interface for adding and maintaining various portal resources, we should survey the concepts Liferay uses to organize a portal. Portals are accessed by users. Users can be collected into user groups. Users can belong to organizations. Organizations can be grouped into hierarchies, such as Home Office → Regional Office → Satellite Office. Sites can be created independently or can be attached to users or organizations. Within sites, users can belong to teams, which are groupings of users for specific functions within a site

A simple way to think about this is that your portal has users and various ways to group them together. Some of these groupings may be organized hierarchically by an administrator. These are called organizations. An administrator can also create more ad hoc groupings of users called user groups. User groups can be composed of users who do not fit into a particular hierarchy or who belong to different organizations. Other groupings may be created by the users themselves. For example, users from different organizations could create a site called "Dog Lovers" and allow anyone to join. The site would not fit into an organizational hierarchy; it would just serve a common interest in dogs. Administrators can create teams within sites. The following figure illustrates how users can be grouped in Liferay Portal: users can belong to sites, organizations, and user groups and user groups can belong to sites and organizations.

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