Yahoo! supports the following feed formats. Yahoo! does recognize files with a .gz extension as compressed files and decompresses them before parsing.

• RSS 0.9, RSS 1.0, or RSS 2.0, for example, CNN Top Stories
• Sitemaps, as documented on www.sitemaps.org
• Atom 0.3, Atom 1.0, for example, Yahoo! Search Blog
• A text file containing a list of URLs, each URL at the start of a new line. The filename of the URL list file must be urllist.txt. Compressed files must be named urllist.txt.gz.
• Outline Processor Markup Language (OPML). OPML files are typically lists of XML file "pointers" that indicate where the feed information originates. OPML can display that information in the form of an outline.

If you are submitting a large number of feed files, instead of typing each feed URL/XML file location into Site Explorer, create an OPML file which "points" to all your DataRSS XML files.

• NewsML DataRSS is an XML format that supports news data, groups of news data, and connections between news data and linked metadata. For more information on the NewsML format see the following:
• IPTC
• Cover Pages
• IPTC Home page.

Note: Yahoo! SearchMonkey requires the following NewsML elements for a successful feed submission. See the samples of NewsML DataRSS at: SearchMonkey Creating Feeds.

• Google Base is a database supported by Google that accepts various forms of content such as structured mark-up, images, and tab-separated value (TSV). For more information see the Google Base website or the Google Merchant Center. To submit Google Base feeds, to the Yahoo! index, you must use the following formats and tools:

Your data must use one of these feed formats:

• TSV Feeds
• RSS 2.0 Specification or the RSS Advisory Board
• Google Base Atom 1.0 or RFC4287.

You must submit your feeds through Yahoo!Site Explorer. Yahoo! Search then indexes your feed submission and makes the data available to SearchMonkey for building Enhanced Result Search applications which are displayed on the Yahoo! Search results page. See SearchMonkey Feed Submission Overview for more information.

Yahoo! also supports feeds for Mobile sites. When submitting a feed that "points" to content on the mobile web, please indicate whether the encoding of the content is xHTML or WML. From the "Manage Sites" page, please click the arrow to the left of Add Feed to select feed type. Submitting mobile feeds directs our mobile search crawlers to discover and crawl new content for our mobile index.