Context 

Definition

The data used in the component or in the view is stored in the context. Read-write access to this data is available using the controllers as a starting point.

Structure

The data from the contexts is managed in a hierarchical structure. Each context has a root node, underneath which the individual data fields (attributes) are stored in a tree structure. You create this tree structure according to the structure of your application.

Each node contains data fields, which represent either an individual instance of an object type or a table of instances. This property of a node is known as its cardinality. The following table summarizes the possible cardinalities for a node:

Cardinality	Description
1:1	The node contains only one instance, which must always be instantiated.
0:1	The node contains only one instance, which does not need to be instantiated.
1:n	The node can contain multiple instances, of which at least one must always be instantiated.
0:n	The node can contain multiple instances, of which none have to always be instantiated.