<!DOCTYPE svg [
<!ENTITY ent1 SYSTEM 'external_foo.ent'>
<!ENTITY ent2 SYSTEM 'external_foobr.ent'>
<!ENTITY ent3 SYSTEM 'external_widget.ent'>
<!ENTITY ent5 PUBLIC "entityURI" "entityFile" NDATA notation1>
<!ELEMENT svg (rect,script,p*)>
<!ATTLIST svg xmlns CDATA #IMPLIED>
<!ELEMENT rect EMPTY>
<!ATTLIST rect
   x CDATA #REQUIRED
   y CDATA #REQUIRED
   width CDATA #REQUIRED
   height CDATA #REQUIRED
   fill CDATA #REQUIRED>
<!ELEMENT p (#PCDATA|br)*>
<!ATTLIST p xmlns CDATA #IMPLIED
          xml:base CDATA #IMPLIED>
<!ELEMENT br EMPTY>
<!ELEMENT script (#PCDATA)>
<!ATTLIST script type CDATA #IMPLIED>      
<!ENTITY svgunit SYSTEM "svgunit.js">
<!ENTITY svgtest SYSTEM "svgtest.js">
<!NOTATION notation1 PUBLIC "notation1File">
]>
<svg xmlns="http://www.w3.org/2000/svg">
<rect x="0" y="0" width="100" height="100" fill="blue"/>
<script type="text/ecmascript">&svgtest;&svgunit;</script>
<p xmlns='http://www.w3.org/1999/xhtml'>bar&ent2;&ent1;</p>
<p xmlns='http://www.w3.org/1999/xhtml' xml:base="http://www.example.com/bogus_base">bar&ent2;&ent1;</p>
&ent3;
</svg>