출처 : www.rssboard.org RSS 2.0 Specification Archivist's Note: This is version 2.0.10 of the RSS 2.0 specification, published by the RSS Advisory Board on Oct. 15, 2007. The current version of the RSS spec will always be available at this link, all changes have been logged and other revisions have been archived. Contents What is RSS? Sample files About this document Required channel elements Opti..