What are the guidelines around filters and querystring parameters in RSS Feeds?
I run a site where users can upload content that is tagged by a special set of tags.  While implementing RSS feeds, I was wondering what, if any, rules or guidelines exist for using a querystring to filter what content an RSS feed shows. For example, the feed that shows all content on the site would be:

>/feed

If someone was interested in all the work that was tagged with fashion, the URL would be

>/feed?tag=fashion


What are the guidelines around filters and querystring parameters in RSS Feeds?
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I run a site where users can upload content that is tagged by a special set of tags.  While implementing RSS feeds, I was wondering what, if any, rules or guidelines exist for using a querystring to filter what content an RSS feed shows. For example, the feed that shows all content on the site would be:

>/feed

If someone was interested in all the work that was tagged with fashion, the URL would be

>/feed?tag=fashion

