Looking for definitions on view "Targets"

The Target enum lists a bunch of different targets for explaining how content is being viewed.  I think that I understand what most of them are for, but there are a couple of questions.

Both of these are coming up when I'm working with Mentionables, Peekables, and Searchables.  What is the difference between them?  I can't quite get a handle on the difference of when they are used.

  • Web
  • WebQuote

I think I know what these are for, but I'd like to get confirmation.

  • Syndication - RSS feeds?
  • Print - When you print a page from your web browser.
  • Nntp - Network News protocol?  What in Verint uses NNTP?
  • Email - When rendered in an email.
  • WebServices - When rendered in the results of a REST call?

I'm not sure when these might be used, are there any common examples?

  • Unknown
  • Offline
  • Other

Thanks.

Doc Ref: community.telligent.com/.../target-plugin-supplementary-type