<?xml version="1.0"?>
<!DOCTYPE root [
  <!ELEMENT root (#PCDATA|b)* >
  <!ELEMENT b (#PCDATA) >
  <!ATTLIST b attr1 CDATA #IMPLIED>
  <!ATTLIST b attr2 CDATA #IMPLIED>
  <!ATTLIST b attr3 CDATA #IMPLIED>
]>
<root>
  <b>without white space</b>
  <b > with a white space</b>
  <b attr1="value1">one attribute</b>
  <b attr1="value1" attr2="value2" attr3 = "value3">one attribute</b>
</root>
<!--* testing P40 *-->