NCL Website header
NCL Home > Documentation > HLUs > Classes

DataItem class

The DataItem class provides a way to describe data to the HLU library.


Synopsis

Header file:		ncarg/hlu/DataItem.h
Class name:		dataItemClass
Class pointer:		<Not referenceable>
Fortran class function:	<Not referenceable>
Superclass:		Base
Composite classes:	<None>

Resources

Local resources

The DataItem class doesn't define any public resources.

Superclass resources

There are no Superclass resources.


Description

The DataItem class is used as a building block for all the objects that describe data to the HLU library. There are no actual data description resources or anything in this class accessible to the application programmer. This class is the basis for all the classes that do describe data. It understands how to communicate with the DataComm class so that the actual data description objects can share that functionality.

Support functions

Some of the support functions for the DataComm class are intended to be used with DataItem class objects. Additionally, the DataItem class defines the following function:
NhlIsDataItem
This function just determines if a given object id identifies a DataItem class object.

See also