If desired, add additional descriptive elements. In each case, use the syntax <tag>content</tag>
to advise prospective readers what language your content is in. Use the two-letter code listed in http://www.rssboard.org/rss-language-codes
. English is en
to declare the rights restrictions for your content.
to give the email of the person who is in charge of content.
to give the email address of the person in charge of technical issues regarding your site.
for the official publication date of your content, like the dateline on a newspaper article. The date must be in RFC-822 format (see the third tip).
to specify the actual date and time the content was last updated, in RFC-822 format (again, see the third tip).
to help aggregators classify your feed and make it easier for folks to find you (but see sidebar).
(which stands for time to live
) to indicate how frequently you are most likely to update it and thus how often the aggregator should come back and refresh.