Previous columns have separately addressed Web services and also enterprise portals. This month's column bridges both topics and discusses the use of Web services within enterprise portals through specification of Web services for remote portals (WSRP). For this and following months' columns, I have drawn on the WSRP specifications and also the "WSRP Overview" presentation on the OASIS Web site at http://www.xml.org/, as published by the OASIS WSRP Technical Committee. Their excellent work with WSRP is acknowledged here. With their permission, a number of figures from that presentation are included here. Please note that these figures are sourced from OASIS, copyright 2002-2003 OASIS, all rights reserved.

Many content providers publish their content live on the Internet using HTTP or FTP servers, or they provide client software that replicates and caches content via proprietary protocols. In each case, integrating content into an enterprise portal is a difficult task. While portals provide some portlets supporting particular content providers out of the box, it is often necessary to develop and install additional portlets for the remaining content providers.

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