This contains a string of the unique identifier of a thing. A donkey, on the other hand, starts with a def containing "Donkey" in the section that describes pawns. For example, an element needs > li.Need_Food > def (in CSS selector syntax) has the value "Food", explaining that the data is about need for food. "def" contains a single string that refers to some item or property. It can have many different meanings depending on what the element surrounding it is. As in HTML, this simply stands for a "list item". Important elements You will notice that "li" appears a lot in the save file.