<!DOCTYPE dcm:test SYSTEM "DICOMelements.dtd" [
<!ENTITY % dcm "dcm:">
<!ELEMENT dcm:test (dcm:group.length)>
]>
<dcm:test xmlns:dcm="http://www.openhealth.org/ASTM/1/DICOM">
	<dcm:group.length><dcm:UL>123</dcm:UL></dcm:group.length>
</dcm:test>