src/java/org/apache/fop/render/pdf/pdfbox/PageParentTreeFinder.java (1 line):
	- line 54: //TODO handle structural hierarchy in xboject stream


src/java/org/apache/fop/render/pdf/pdfbox/PDFCloner.java (1 line):
	- line 117: //TODO Do we need a PDFBoolean here?