No title specified
The title of the piece of media.
The real name of the person or group who created the media.
The username of the person who created the media, if applicable. Will be displayed in brackets after Author if that field is filled in too.
The name of the person conducting an interview - user Author and/or Username for the name of the interviewee.
The date the media was published.
The location where this media can be viewed on the internet.
If the media is part of a greater work (an essay in an anthology, paper in a journal issue, article in a maganize, etc), name it here. For newspapers and sites like that, use Publisher.
For reddit comments, reblog replies, quote tweets, forum posts, etc - the title of the media it's responding to.
For reddit comments, reblog replies, quote tweets, forum posts, etc - the url of the media it's responding to.
For print media, what page(s) the source can be found on.
For audio/video media, what timestamp the source can be found at.
The publisher of the media.
If the media is no longer available on the web, an archive url can be specified here. Reblogs on tumblr may be treated as archive urls.