23. DTD for an Attribute with a List of Entity Names

An attribute can be set to hold a list of entity names. Entity names are required to be separated by white space.

Example 23.1 An ENTITIES Attributes Type
<?xml version="1.0" standalone="yes"?>
<!DOCTYPE rootelement [
<!ELEMENT rootelement (childelement1)>
<!ELEMENT childelement (#PCDATA)>
<!ATTLIST childelement
sampleattribute ENTITIES #IMPLIED>
<!ENTITY sampleentity1 SYSTEM "entity reference value 1">
<!ENTITY sampleentity2 SYSTEM "entity reference value 2">
	<childelement sampleattribute="sampleentity1 sampleentity2">
		Child element.