<https://reference.aspose.com/tutorials/pdf/java/pdf-images/create-filled-rectangle-object-in-pdf-using-java/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://reference.aspose.com/tutorials/pdf/java/pdf-images/create-filled-rectangle-object-in-pdf-using-java/>