ESI

Edge Side Includes (ESI) is a simple markup language used to define Web page components for dynamic assembly and delivery of Web applications at the edge of the Internet... ESI provides a mechanism for managing content transparently across application server solutions, content management systems and content delivery networks. As a result, ESI enables companies to develop Web applications once and choose at deployment time where the application should be assembled - on the content management system, the application server or the content delivery network, thus reducing complexity, development time and deployment costs.