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XMM-Newton Science Analysis System


dal (dal-1.182.1) [xmmsas_20070708_1801-7.1.0]

Meta Index / Home Page / F90 DAL API

Class Relationships

The C++ classes are related to each other in two ways.

The first is the Base-Derived relationship

The F90 API supports the Base-Derived relationships through Base-Class conversion functions. These are: block, attributable, and labelled.

and the second is the Parent-Child relationship.

These relationships are handled in the F90 API through the parent() function. This function has been overloaded, and returns the parent object of the given object.

The following table shows this simple relationship:

Handle	Class	Base Classes	Parent Class
ArrayT	Array	Block	-
		Nullable
		DataComponent
AttributableT	Attributable	Labelled	-
AttributeT	Attribute	Labelled	Attributable
BlockT	Block	Attributable	DataSet
ColumnT	Column	Attributable	Table
		Nullable
		DataComponent
DataComponentT	DataComponent	Nullable	-
NullableT	Nullable	-	-
DataSeT	DataSet	Attributable	DataSetServer
LabelledT	Labelled	-	-
TableT	Table	Block	-

Further details are given in the section on the C++ API.