What is the portal for?

Portal refers to a Web site such as Sina, which uses portal technology. He is an open source site template for. Net
What is Portal?
English is literally "the entrance", the domestic is called "portal" technology, but I think "integration" technology more able to express its meaning. Portal is a Web-based application that mainly provides personalization, single sign-on, content integration from different sources, and the presentation layer for storing information systems.
What are the portal standards?
A JSR168 was developed for the specification Portal,sun at the end of 2003, which defines the portlet standards and gives an implementation interface.
What is a portlet?
A portlet is a Java-based Web component that manages and processes requests by the Portlet container and dynamically generates output content. Portlets are Java-based Web Components that are managed by the Portlet container and processed by the container to produce dynamic content. The portals uses portlets as the pluggable user interface component to provide the presentation layer of the information system. As the next step of Web application programming using Servlets, Portlets realizes modularization and user-centric of Web application. The Portlet specification, the JSR (Java specification request) 168, is designed to interoperate with the portal and portlets. It defines the contract between the Portlet and the Portlet container, allowing the portlet to implement a personalized, represented, and secure set of APIs. The specification also defines how to package portlets in portlets applications.
What are the features of the portal?
Low-cost integration technology. If your site or enterprise already has a lot of information systems, the portal can easily integrate these systems, and in a unified way to provide users, unified can have a unified process, such as: Landing, customization, browsing, interface unification, such as: Display style of the height of the modular. Through the portal technology provided by the plugin technology, can be based on the needs of enterprises, netizens to compile standard modules, and embedded in the portal system for enterprises, netizens use. Highly scalable, there are many products and standards to develop the portal, as these products and standards, such as: jsr-168, through the concept of the portlet to expand the functionality of the portal.
What is the use of the portal?
Personally think from two aspects. One is for the use of people (netizens). Thanks to the portal's features, businesses and websites can easily encapsulate their services in a standard package, inserting the portal system and providing it with users. Now many portals and professional sites have a lot of services, but many service users have not been used, discovered, through the form of portal to the user a centralized experience of the place. The second is for enterprises, enterprises can be existing information systems, resources through the portal to encapsulate, to provide users with. For example: Some companies have reimbursement system, assessment system, conferencing system, but these systems are separated from each other, the use and interface is not unified, through the portal can easily be provided by these systems to encapsulate the services and presented to the user.

What is the portal for?