An attribute is a field that is used to store data within an item.
Attributes represent the highest level data component within an item in a file. An item can contain any number of attributes, each of which can contain any number of values, which in turn can be composed of any number of subvalues.
See Also
Attribute Mark, Dictionaries, Dictionaries as Operators, Element, Data, Item, Metacharacters, Retrieval of Items from Files, Subvalue, ud Command, Value