Bug 153040 Template definition should be removed after the report item is deleted
Steps to reproduce: 1.New a report, extends lib.label 2.Convert the label to template report item, and revert it back to the report item 3.Delete the label 4.Remove the included library Expected result: Library can be removed Actual result: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Model Plug-in ID:org.eclipse.birt.report.model Version:2.1.0.v20060808-0630 Error Code:Error.LibraryException.LIBRARY_HAS_DESCENDENTS Error Message:The library "Lib" can no be dropped because it has descendents "NewLabel" in the current module.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/core/UserPropertyDefn.java
*/
	public static final String DISPLAY_NAME_ID_MEMBER = "displayNameID"; 
	/**
	 * Name of the structure itself. This is the name used to identify the
	 * structure in the meta-data dictionary.
	 */
	public static final String STRUCTURE_NAME = "UserProperty"; 
	/**
	 * Name of the choices member.
	 */
	public static final String CHOICES_MEMBER = "choices"; 
	/**
	 * All the allowed types of UserProeprtyDefn. Now, "extends", elementRef,
	 * structRef, structure are not supported.
	 */
	private static List allowedTypes = null;
	/**
	 * Default constructor.
	 */
	public UserPropertyDefn( )
	{
		PropertyType typeDefn = MetaDataDictionary.getInstance( )
				.getPropertyType( PropertyType.STRING_TYPE_NAME );
		setType( typeDefn );
	}
	/**
	 * Gets valid types for user property. Each one in the list is an instance
	 * of <code>IPropertyType</code>.
	 * 
	 * @return the list of allowed property types for user property.