It works with RSS 0.90, 0.91, 0.92, 0.93, 0.94, 1.0, and 2.0. If the validator finds any problems in your feed, it will give you messages for each type of problem and highlight where the problem first occurs in your feed.
If you're unsure what a message means, click the "help" link next to the message for a fuller explanation.
Schematron is a schema language that allows a document to be validated by testing it against a set of patterns (XPath expressions).
Schematron validation rules allow the author to specify a helpful error message which will be provided to the user if an error is encountered.
RSS 1.0 Validator - This prototype is based around a Schematron schema for validating RSS 1.0 by Leigh Dodds. rss2html RSS to html script to display RSS on a website.
Currently, I'm using xml_domit_rss as the parser but I'm unsure if it's actually validating the URL before parsing.
From what I can gather online, it looks as if validating is separate from the parse, either by using a service (feedvalidator.org) or some other method (parse_url()).
RSS Software History of RSS XML Basics RSS Articles RSS Uses Create RSS Feed Submit RSS Feeds Display RSS Feed Validators RSS Graphics RSS FAQ RSS Directory RSS Forums RSS Feeds Syndicate Content Subscribe to Feeds Aggregator How To RSS Sites RSS Blog RSS Wiki's Top 10 RSS RSS Subscriptions RSS Feed Validators determine if your feed is valid.
Feed Validator - This is a validator for syndicated feeds.