The CLI documentation for XMLBrowser queries states:

[quote]
For each element:   	
  id 	        An item's hierarchical id. Item delimiter.
  name 	        An item's (station, track, podcast etc.) name or title.
  hasitems 	Whether or not an item has sub-items. May indicate the number of sub-items.
  isaudio 	Whether or not an item is audio, determined from the other fields (type, etc.)
  type 	        Stream content type. Value "link" means sub-items must be fetched. Example types: link, text, audio, playlist.
  url 	        URL of the station or track (only returned if parameter "want_url" is set to 1). Although, the station can be played using the "playlist play" command, an equivalent command that operates on the id is provided below.
  description 	Some streams (podcasts) provide further information than the title.
  length 	Some streams (podcasts) contain information about their size/length. 
[/quote]

However, Podcasts use "title" instead of "name" and some plugins provide an "image".
This is not documented