Edge Side Includes or ESI is a small markup language for edge level dynamic web content assembly. The purpose of ESI is to tackle the problem of web infrastructure scaling. It is an application of edge computing.
It is fairly common for websites to have generated content. It could be because of changing content like catalogs or forums, or because of personalization. This creates a problem for caching systems. To overcome this problem a group of companies (Akamai, Art Technology Group, BEA Systems, Circadence Corporation, Digital Island, Inc., Interwoven, Inc., Open Market, whose ESI-related technology is now owned by FatWire Software, Oracle Corporation and Vignette Corporation) developed the ESI specification and submitted it to the W3C for approval. The proposal editor was Mark Nottingham.
ESI Language Specification 1.0 was submitted to the World Wide Web Consortium (W3C) for approval in August 2001. The W3C has acknowledged receipt, but has not accepted the proposal.
ESI is implemented by some content delivery networks, such as Akamai, and by some caching proxy servers such as Varnish, Squid and Mongrel ESI, although many do not implement the complete specification. Akamai also adds additional features to the version they support.
Read more about Edge Side Includes: How ESI Is Implemented, Features, Alternatives
Famous quotes containing the words edge, side and/or includes:
“The real risks for any artist are taken ... in pushing the work to the limits of what is possible, in the attempt to increase the sum of what it is possible to think. Books become good when they go to this edge and risk falling over it—when they endanger the artist by reason of what he has, or has not, artistically dared.”
—Salman Rushdie (b. 1947)
“Joyce for all his devotion to his art, terrible in its austerity, was a lad born with a song on one side of him, a dance on the other—two gay guardian angels every human ought to have.”
—Sean O’Casey (1884–1964)
“The complete life, the perfect pattern, includes old age as well as youth and maturity. The beauty of the morning and the radiance of noon are good, but it would be a very silly person who drew the curtains and turned on the light in order to shut out the tranquillity of the evening. Old age has its pleasures, which, though different, are not less than the pleasures of youth.”
—W. Somerset Maugham (1874–1965)