<?xml version="1.0"?>
<!DOCTYPE root [
  <!ELEMENT root (#PCDATA|b)* >
  <!ELEMENT b EMPTY >
  <!ATTLIST b attr1 CDATA #IMPLIED>
  <!ATTLIST b attr2 CDATA #IMPLIED>
  <!ATTLIST b attr3 CDATA #IMPLIED>
]>
<root>
  <b/>without white space
  <b /> with a white space
  <b attr1="value1" />
  <b attr1="value1" attr2="value2" attr3 = "value3"/>
</root>
<!--* testing P44 *-->