classDiagram
class Item {
+Identity : String
+Attributes : Object
}
class Item2 {
+Identity : String
+Attributes : Object
}
Item --|> Item2 : Does not depend on
In general: Anything which is perceivable or conceivable (Item).
In software engineering: an individual Item which has an identity, is characterized by the values of its Attributes and does not depend on another item (Entity).