Bug 149922 Image builder - URI and file source type are treated as same
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/StringUtil.java
if ( qualifiedName == null )
			return null;
		int pos = qualifiedName.indexOf( '.' );
		if ( pos == -1 )
			return qualifiedName;
		return StringUtil.trimString( qualifiedName.substring( pos + 1 ) );
	}
	/**
	 * Builds the qualified reference value.
	 * <p>
	 * For example,
	 * <ul>
	 * <li>("LibA", "style1") => "LibA.style1"
	 * <li>(" ", "style1) => "style1"
	 * </ul>
	 * 
	 * @param namespace
	 *            the library namespace to indicate which library the reference
	 *            is using.
	 * @param value
	 *            the actual reference value
	 * @return the qualified reference value
	 */
	public static String buildQualifiedReference( String namespace, String value )
	{
		if ( StringUtil.isBlank( namespace ) )
			return value;
		return namespace + "." + value; 
	}
}