Bug 188596 Some parameter value cannot be passed to report through URL[0002]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ScalarParameterBean.java
/**
	 * Parameter definition reference.
	 */
	private ParameterDefinition parameter = null;
	/**
	 * Is parameter value required.
	 */
	private boolean isRequired = false;
	/**
	 * Current parameter value.
	 */
	private String value = null;
	/**
	 * Display text for current parameter
	 */
	private String displayText;
	/**
	 * Selection item list. Label is HTML encoded.
	 */
	private Vector selectionList = new Vector( );
	/**
	 * Whether current value is in the selection list.
	 */
	private boolean valueInList = true;
	/**
	 * Current parameter default value.
	 */
	private String defaultValue = null;
	/**
	 * Diaplay text of current default value.