From:  http://www.w3.org/TR/data-extraction
Date:  2001-11-06

APPENDIX 1. DATA EXTRACTION LANGUAGE DTD

<!DOCTYPE wrapper [

    <!ELEMENT wrapper (template*, map, (repeat | test | map | extract | set | runtemplate | charsetmap | stringconvert | count)*) >

    <!ELEMENT template (repeat | test | map | extract | set |runtemplate | charsetmap | stringconvert | count)*>

    <!ATTLIST template

            name ID #REQUIRED >

    <!ELEMENT repeat (repeat | test | map | extract | set | runtemplate | charsetmap | stringconvert | count)* >

    <!ATTLIST repeat

            times CDATA #REQUIRED >

    <!ELEMENT test (repeat | test | map | extract | set | runtemplate | charsetmap | stringconvert | count)* >

    <!ATTLIST test

            testtype (equal | unequal | less | greater | re_equal | re_unequal | contains) #REQUIRED

            value1 CDATA #REQUIRED

            value2 CDATA #IMPLIED >

    <!ELEMENT map EMPTY >

    <!ATTLIST map

            maptype (getTemplate | documentReady | moveCursor | createDocument | createElement | createElementBefore | createElementAfter |
            createAttribute | createTextNode | createComment | createCDATA | createProcessingInstructions) #REQUIRED

            node CDATA #REQUIRED

            content CDATA #IMPLIED >

    <!ELEMENT extract (repeat | test | map | extract | set | runtemplate | charsetmap | stringconvert | count)* >

    <!ATTLIST extract

            exptype (length | upto | over | re_upto | re_over| content) #REQUIRED

            expression CDATA #REQUIRED

            save CDATA #IMPLIED >

    <!ELEMENT set EMPTY >

    <!ATTLIST set

            parameter (doctype | encoding | memory | append | serializeOutput) #REQUIRED

            value1 CDATA #REQUIRED

            value2 CDATA #IMPLIED

            value3 CDATA #IMPLIED >

    <!ELEMENT runtemplate EMPTY >

    <!ATTLIST runtemplate

            nameref IDREF #REQUIRED >

    <!ELEMENT charsetmap (values)*>

    <!ATTLIST charsetmap

            name CDATA #REQUIRED >

    <!ELEMENT values EMPTY >

    <!ATTLIST values

            search CDATA #REQUIRED

            replace CDATA #REQUIRED >

    <!ELEMENT stringconvert (register)*>

    <!ATTLIST stringconvert

            use CDATA #REQUIRED

            overlapping (true | false) #REQUIRED >

    <!ELEMENT register EMPTY>

    <!ATTLIST register 

            nameref CDATA #REQUIRED >

    <!ELEMENT count EMPTY

    <!ATTLIST count

    parameter (plus | minus | multiply | divide | decimal) #REQUIRED

    value1 CDATA #REQUIRED

    value2 CDATA #REQUIRED

    value3 CDATA #IMPLIED >

]>