<?xml version="1.0"?>
<!DOCTYPE root [
<!ELEMENT root ANY>
<!ATTLIST root attr1 CDATA #IMPLIED>
<!ATTLIST root attr2 CDATA #IMPLIED>
<!ENTITY withlt "have <lessthan> inside">
<!ENTITY aIndirect "&withlt;">
]>
<root attr1="&aIndirect;">indirect reference to an entity with &lt; as part of its replacement text in Attribute</root>