+#include <QCheckBox>
+
+/*
+ \class QDS_CheckBox
+ \brief Datum with control corresponding to check box.
+
+ This control can have only two states:
+ - 1 (on/true)
+ - 0 (off/false).
+
+ QDS_CheckBox don't take into account standard parameter properties
+ (minimum, maximum, filter, etc).
+
+ QDS_CheckBox can set and get following values for access methods (setStringValue(),
+ setIntegerValue(), setDoubleValue(), stringValue(), integerValue(), doubleValue()):
+ - "1" - check box state is switched on.
+ - "0" - check box state is switched off.
+ - "-1" - check box state is "PartiallyChecked" (undefined).
+
+ User can set and test "PartiallyChecked" check using methods clear()
+ and isEmpty() correspondingly.
+*/