.TH Data 3U "23 January 1991" "Unidraw" "InterViews Reference Manual"
.SH NAME
Data \- object containing undo information for storage in a command
.SH SYNOPSIS
.B #include <Unidraw/Command/data.h>
.SH DESCRIPTION
Data is an abstract base class for objects that components store in
commands they (un)interpret.  Components use Data subclasses to store
whatever information they need to uninterpret the command.
.SH PROTECTED OPERATIONS
.TP
.B "Data()"
The constructor is protected to prevent instantiation.
.SH SEE ALSO
Command(3U), Component(3U), Resource(3I)