<phrase>YOUR PHRASE GOES HERE</phrase>
Phrase tags can be extended with optional attributes to provide additional information for the player.
The 'subcategory' Attribute
To further categorize your phrases (which makes it a little easier on the players), you can add a subcategory attribute to your opening phrase tag:
... where "SSSSS" is the name of the subcategory. During the game, when an optional subcategory attribute appears in a phrase tag, the subcategory appears above the puzzle and the main category appears below the puzzle.
The 'moreinfo' Attribute
This attribute can be used to present the player with a fact or piece of trivia pertaining to a phrase after he or she has completed that phrase. It is formatted like this:
<phrase moreinfo="more info goes here">
And remember, since the moreinfo and subcategory attributes are optional, any of these following phrases are legal:
<phrase subcategory="INVENTIONS">TRACTOR (1900)</phrase>
<phrase moreinfo="By Benjamin Holt, United States.">TRACTOR (1900)</phrase>
<phrase subcategory="INVENTIONS" moreinfo="By Benjamin Holt, USA">TRACTOR (1900)</phrase>