Bug 179674 Support time dimension in model
When define time dimension in model, the "itTime" property will be set. However this is not enough. We also need to know to what precision the time value should be evaluated, say, year, month, day, etc. Model needs to be enhanced to support such requirement.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/elements/DesignChoiceConstants.java
public static final String CHOICE_ACTION_FORMAT_TYPE = "actionFormatType"; 
	public static final String ACTION_FORMAT_TYPE_HTML = "html"; 
	public static final String ACTION_FORMAT_TYPE_PDF = "pdf"; 
	
	public static final String CHOICE_TEXT_CONTENT_TYPE = "textContentType"; 
	public static final String TEXT_CONTENT_TYPE_AUTO = "auto"; 
	public static final String TEXT_CONTENT_TYPE_PLAIN = "plain"; 
	public static final String TEXT_CONTENT_TYPE_HTML = "html"; 
	public static final String TEXT_CONTENT_TYPE_RTF = "rtf"; 
	
	public static final String CHOICE_TEXT_DATA_CONTENT_TYPE = "textDataContentType"; 
	public static final String TEXT_DATA_CONTENT_TYPE_AUTO = "auto"; 
	public static final String TEXT_DATA_CONTENT_TYPE_PLAIN = "plain"; 
	public static final String TEXT_DATA_CONTENT_TYPE_HTML = "html"; 
	public static final String TEXT_DATA_CONTENT_TYPE_RTF = "rtf"; 
	
	public static final String CHOICE_OPRHANS = "orphans"; 
	public static final String ORPHANS_INHERIT = "inherit"; 
	
	public static final String CHOICE_WIDOWS = "widows"; 
	public static final String WIDOWS_INHERIT = "inherit"; 
	/**
	 * FormatType -- The target output format. The first constant is the name of
	 * FormatType choice. The followed constants are valid choice values of
	 * FormatType.
	 */
	public static final String CHOICE_FORMAT_TYPE = "formatType"; 
	public static final String FORMAT_TYPE_ALL = "all"; 
	public static final String FORMAT_TYPE_VIEWER = "viewer";