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<?xml version="1.0" encoding="utf-8"?>
<!ELEMENT control ((node|alph)*)>
<!ATTLIST control name CDATA #REQUIRED>
<!ELEMENT node ((node|move|delete|copy|speak|pause|stop|ref|root|alph)*)>
<!--by specifying the name attribute as type ID rather than CDATA, the XML
validator checks that all IDs are distinct:-->
<!ATTLIST node name ID #IMPLIED>
<!ATTLIST node label CDATA #REQUIRED>
<!ATTLIST node color CDATA #IMPLIED>
<!ELEMENT move EMPTY>
<!ATTLIST move forward (yes|no) #REQUIRED>
<!ATTLIST move dist (char|word|line|sentence|paragraph|page|all) #REQUIRED>
<!ELEMENT delete EMPTY>
<!ATTLIST delete forward (yes|no) #REQUIRED>
<!ATTLIST delete dist (char|word|line|sentence|paragraph|page|all) #REQUIRED>
<!ELEMENT copy EMPTY>
<!ATTLIST copy what (new|repeat|word|line|sentence|paragraph|page|all) #REQUIRED>
<!ELEMENT speak EMPTY>
<!ATTLIST speak what (cancel|new|repeat|word|line|sentence|paragraph|page|all) #REQUIRED>
<!ELEMENT pause EMPTY>
<!ELEMENT stop EMPTY>
<!ELEMENT ref EMPTY>
<!--by specifying the name attribute as type IDREF rather than CDATA, the XML
validator checks that a node with that name (as an ID) exists-->
<!ATTLIST ref name IDREF #REQUIRED>
<!ELEMENT root EMPTY>
<!ELEMENT alph EMPTY>
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