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1. Atom? ¶
Atom is an XML-based document format and HTTP-based protocol designed for the syndication of Web content such as weblogs and news headlines to Web sites as well as directly to user agents. It is based on experience gained in using the various versions of RSS. Atom was briefly known as "Pie" and then "Echo".
The completed Atom syndication format specification was submitted to the IETF for approval in June 2005, the final step in becoming an RFC Internet Standard. In July, the Atom syndication format was declared ready for implementation1. The latest Atom data format and publishing protocols are linked from the Working Group's home page.
Before the Atom work entered the IETF process, the group produced "Atom 0.3", which has support from a fairly wide variety of syndication tools both on the publishing and consuming side. In particular, it is generated by several Google-related services, namely Blogger and Gmail.
As well as syndication format, the Atom Project is producing the "Atom Publishing Protocol", with a similar aim of improving upon and standarizing existing publishing mechanisms, such as the Blogger API and LiveJournal XML-RPC Client/Server Protocol.