Bug 196894 BIRT Cross tab, Cube - Time dimension enhancements
There were a couple of time dimension related enhancments planned post BIRT 2.2. This entry is to track those. This enhancments also includes - supporting additional predefined data time formats, that could make it easier to define data time dimension and use it in data items.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/interfaces/ILevelModel.java
*/
	String INTERVAL_BASE_PROP = "intervalBase"; 
	/**
	 * Name of the property that gives the interval range of search.
	 */
	String INTERVAL_RANGE_PROP = "intervalRange"; 
	/**
	 * Name of the property that gives the interval of search.
	 */
	String INTERVAL_PROP = "interval"; 
	/**
	 * Name of the property that indicates whether this level is static, dynamic
	 * or mirrored.
	 */
	String LEVEL_TYPE_PROP = "levelType"; 
	/**
	 * Name of the property that gives the data type of this level.
	 */
	String DATA_TYPE_PROP = "dataType"; 
	/**
	 * Name of the property that specifies a list of privilige of users.
	 */
	String VALUE_ACCESS_CONTROLS_PROP = "valueAccessControls"; 
	/**
	 * Name of the property that defines the type of a date-time level, such as
	 * year, quater, month, week, day.
	 */
	String DATE_TIME_LEVEL_TYPE = "dateTimeLevelType"; 
}