Instances and their Attributes

About Instances

Instances are Definitions made into specific objects. In other words, an Instance is a concrete example of an abstraction. We make an instance by giving it a unique name, which ensures it can be distinguished from every other instance of the same definition. Instances are always based on specific definitions, however a unique feature of DMO is that we can change the definition associated with an instance. If we do this, any attributes that don't exist for the new definition may be lost. Instances may stand alone, or may be organized into one or more simple trees, which can start with any arbitrary instance as the root. By default, DMO will start display of trees with the first Location instance which it finds, allowing the trees to be organized geographically.

There are several ways in which instances may be viewed: