is a URI (typically a 'mailto:' URL) for contacting the person or source of the particular instance of RSS/RDF information. This would generally be used to report technical errors in the use of RSS, RDF, or XML. ]]> is a URI of the software that was used to generate the RSS/RDF. This is similar to the User-Agent field in HTTP or the X-Mailer field in email. It can be used to spot and report errors in the generating software and for statistical information. The URI should include version information, and if it is a resolvable URL should return a user-readable HTML page. ]]> Administrative extension http://web.resource.org/rss/1.0/modules/admin/