You can check RSS 0.91, RSS 1.0, RSS
2.0, and Atom documents online using Mark Pilgrim and Sam Ruby's Feed Validator (http://feedvalidator.org). The project is
hosted on SourceForge (http://sourceforge.net/projects/feedvalidator/).
This hack will use Feed Validator to check an RSS or Atom document.
Go to http://feeds.archive.org/validator/ and in
the text box, enter the URL
http://www.wyeast.net/news.rss (0.91) as shown in
, or an Atom document,
http://www.wyeast.net/atom.xml. (The scheme name
http:// is already provided in the text box.)
Click the Validate button. The file is processed and the results are
posted to the browser ().
Figure 1. Feed Validator in Firefox
Figure 2. Results of validating an RSS document with Feed Validator
If the validator generates errors, you can read more about these
errors at http://feedvalidator.org/docs/. For example,
if your RSS document is not well-formed, it will generate an XML
parsing error, which you can read about at http://feedvalidator.org/docs/error/SAXError.html.
Figure 3. W3C RDF validator
If you want to parse an RSS 1.0 feed, you can validate it with the
W3C RDF validator because it is written as RDF. Go to http://www.w3.org/RDF/Validator/ and enter
the URL http://www.wyeast.net/wyeast.rss, as shown
in . (You can also paste RDF markup into
the text box directly to validate it.) Click Parse URI. If the parse
is successful, you will see results like those shown in .
Figure 4. Results of parse in W3C RDF validator