<?xml version="1.0"?>
<!DOCTYPE root 
[
<!ELEMENT root (#PCDATA)>
<!ATTLIST root att CDATA #IMPLIED>
<!ATTLIST root entatt1 ENTITY #REQUIRED >

<!--* Test PublicID in P82 *-->
<!NOTATION JPGformat PUBLIC "-//image//notreal" >
<!ENTITY unparsed1  SYSTEM "image.jpg" NDATA JPGformat>
]>
<root entatt1="unparsed1">test PublicID in P82</root>
<!-- a valid test case: test P82 and P83 -->