Where noted, these URLs support the following variable parts:
tag_name — The tag that's been applied to the blog post. In the user interface,
tags are listed at the bottom of the post, or in the content.
user_name — The user's login name.
communityid — You can find this number at the end of the URL after you click
View Feeds in the All Content page. In the Admin Console, the ID number is shown
at Space/Communities > Settings > Space Settings.
document_id — A unique identifier for a document. You'll find the ID at the end
of the URL when you're viewing a document in the application.
post_id — A unique identifier for a blog post.
blog_name – A blog's name. For a user blog, this is typically the user's name.
search_string — For feeds based on searches, this is the URL search parameter
created when the user searches. Here's an example with the typical full set of
search parameters included. In this case, the search term is "macro".