Installation and Upgrade > Windchill ESI > Installing and Configuring Windchill ESI in an ORACLE Applications Environment > Reviewing Requirements > Windchill ESI Requirements
  
Windchill ESI Requirements
Windchill ESI requires a correctly installed version of Windchill PDMLink.
PTC provides a summary of the information on the products and operating systems certified with Windchill ESI, as well as language support and interoperability of PTC products and specific platforms in the Windchill Product Support Matrices. This information is available to you from the following link:
http://www.ptc.com/appserver/cs/doc/indexrefdoc.htmjsp
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Each TIBCO product might require you to apply certain patches to your operating system. Refer to the readme files accompanying each TIBCO product for details on required patches.