Portlets are applications that can get information from a wide variety of sources,
from a database to a web source, and can be plugged into the Portal framework. The
Portal framework provides a look and feel as well as navigation controls for all the
information displayed in it.
Developers can allow users to customize some parts of portlet and page display, and
Portal will automatically save these customizations. Portal provides a single sign-on
capability to identify users and secure content.
A user can search across all information in a portal with a built-in search mechanism.
Developers can also add categorization to pages to aid in searches. A single
Portal deployment can also deploy multiple versions of pages in different languages.
Oracle Application Server 10g Release 2 introduced a new feature called Instant
Portal, which creates a portal, including relevant portlets, with a single click on
installation. The release also added the Oracle Portlet Factory, created to make it
easy to build portlets against a variety of data sources, most notably SAP.
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