Bug 176436 Charts Imported from Libraries do not update when libraries change
During a live presentation of BIRT at EclipseCon, we came across a rather embarassing issue. When charts are included in a library, and imported into a report design from a library, any changes to the library instance of the chart do not reflect in the report itself.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DesignElementHandle.java
propHandle.clearValue( );
		}
	}
	/**
	 * Returns <code>true</code> if this element has any locally-defined
	 * property values. Returns <code>false</code> otherwise.
	 * 
	 * @return True if the element has property values, false if not.
	 */
	public boolean hasLocalProperties( )
	{
		return getElement( ).hasLocalPropertyValues( );
	}
	/**
	 * Adds a user-defined property definition. The property definition must
	 * have a valid name and property type. The other attributes can be set
	 * either before or after adding the property to the element. The
	 * application can modify the property definition directly before adding the
	 * property to an element. However, the application must use a structure
	 * handle to modify the definition after it has been added to an element.
	 * 
	 * @param prop
	 *            the user property definition to add. The name and property
	 *            type must be valid.
	 * @throws UserPropertyException
	 *             if the element is not allowed to have user property or the
	 *             user property definition is invalid, or if the value of the
	 *             user-defined choice is invalid for the type of user property
	 *             definition, the property type is incorrect.
	 */