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Liferay Beginner's Guide

Liferay Portal has rich and strong functionalities for online content management. Before we take up its content-related portlet applications, we will review some concepts in content manipulation.
Content shown on a web page can be classified as follows:
Text
Images
PDF files and files of other formats
Videos
The images, formatted files, and videos are relatively static – they do not change very often. Some texts, such as online advertisements, do not change very often either. Other texts, such as the quantity of a certain pair of shoes at http://www.zappos.com/, change very often – they are relatively dynamic.
Liferay Portal uses different portlets to manage different types of content.
For static content, Liferay Portal provides the following applications:
Document library portlet that is used to upload video, audio, image, PDF, Excel, and other files.
Image gallery portlet that is used to upload image files specifically
Web content...
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