namespace1.xml

<?xml version="1.0" encoding="ISO-8859-1" standalone="yes" ?>

<!-- $Id: namespace1.xml,v 1.1 2004/03/03 12:52:19 hxml Exp $ -->

<!DOCTYPE a [
<!ATTLIST a xmlns   CDATA #IMPLIED>
<!ATTLIST a xmlns:d CDATA #IMPLIED>
<!ATTLIST a xmlns:x CDATA #IMPLIED>
<!ATTLIST a xmlns:y CDATA #IMPLIED>
<!ATTLIST a xmlns:z CDATA #IMPLIED>
<!ELEMENT a ANY>

<!-- error: a DTD part contains a not wellformed qualified Name: "a:b:c" -->
<!ELEMENT a:b:c ANY>

<!-- error: an ATTLIST declaration contains as attribute name a not wellformed qualified Name: "x:y:z" -->
<!ATTLIST a:b:c x:y:z CDATA #IMPLIED>

<!-- error: an entity or notation declaration contains a not wellformed NCName: "xyz:abc" -->
<!ENTITY xyz:abc "123">
<!ENTITY % xxx:yyy "zzz">

]>

<!-- everythin is legal here -->
<a
   xmlns  ="default namespace"
   xmlns:d="default namespace"
   xmlns:x="namespace for x"
   xmlns:y="namespace common for y and z"
   xmlns:z="namespace common for y and z"

     att1="abc"
   x:att1="xxx yyy"
   y:att1="abc">

  <!-- legal -->
  <d:b attr2="xxx" d:attr2="yyy" xml:lang="de"/>

  <!-- 4 x error: tag name "..." is not a wellformed qualified name -->
  <d:tag:name/><:tag/><:/><:::/>

  <!-- error: namespace for prefix in tag name "a:a" is undefined -->
  <a:a/>

  <!-- error: multiple occurences of universal names for attributes of tag "d:b" : "{namespace common for y and z}att2" -->
  <d:b y:att2="y" z:att2="z"/>

  <!-- 4 x error: attribute name "..." is not a wellformed qualified name -->
  <d:b d:attr:name="" :attr="" :="" :::=""/>

  <!-- error: namespace value of namespace declaration for "xmlns:x" has no value -->
  <d:b xmlns:x=""/>

  <!-- error: illegal namespace declaration with reserved prefix "..." starting with "xml" -->
  <d:b xmlns:xml="something else"/><d:b xmlns:xml123="something else"/>

  <!-- error: a PI contains a not wellformed NCName: "pi:pi" -->
  <?pi:pi ?>
</a>