originally: http://www.oclc.org/research/projects/schematrans/seel/tutorial/seel-dtd.htm
<!ENTITY % seelnsprefix "seel"> <!ENTITY % seelns "uri:ns:seel"> <!-- This is a DTD for version 0.1 of SEEL. --> <!ELEMENT translation (header, map+)> <!ELEMENT header (sourceschema, targetschema) > <!ELEMENT sourceschema EMPTY > <!ATTLIST sourceschema name CDATA #REQUIRED namespace CDATA #REQUIRED > <!ELEMENT targetschema EMPTY > <!ATTLIST targetschema name CDATA #REQUIRED namespace CDATA #REQUIRED > <!ELEMENT map (source, target)> <!ATTLIST map ID #REQUIRED > <!ELEMENT source (mainpath, context*, micro*)> <!ELEMENT target (mainpath, context*, micro*)> <!ELEMENT mainpath (trunk?, branch+)> <!ELEMENT trunk (step+) > <!ELEMENT branch (step+) > <!ATTLIST branch bid CDATA #IMPLIED > <!ELEMENT step (value?) > <!ATTLIST step name CDATA #IMPLIED name_re CDATA #IMPLIED namespace CDATA #IMPLIED ns_re CDATA #IMPLIED position CDATA #IMPLIED > <!ELEMENT value (#PCDATA | vmatch)* > <!ATTLIST value scheme CDATA #IMPLIED encoding CDATA #IMPLIED language CDATA #IMPLIED type CDATA #IMPLIED transliteration CDATA #IMPLIED > <!ELEMENT vmatch EMPTY > <!ATTLIST vmatch scheme CDATA #IMPLIED encoding CDATA #IMPLIED language CDATA #IMPLIED type CDATA #IMPLIED transliteration CDATA #IMPLIED data CDATA #IMPLIED > <!ELEMENT path (step+) > <!ATTLIST path for (source|target) #IMPLIED place (under|after|before) #IMPLIED > <!ELEMENT transfer EMPTY > <!ELEMENT context (exists | equals | match)+ > <!ATTLIST context bid CDATA #IMPLIED > <!ELEMENT exists (path) > <!ELEMENT equals ( (path, (path, transfer, value) ) | (value,transfer) ) > <!ELEMENT match ( transfer | path ) > <!ATTLIST match negate CDATA #IMPLIED regexp CDATA #IMPLIED > <!ELEMENT micro (add | remove | sub | trim)+> <!ATTLIST micro bid CDATA #IMPLIED > <!ELEMENT add EMPTY> <!ATTLIST add data CDATA #REQUIRED side ( start | end ) #REQUIRED > <!ELEMENT remove EMPTY> <!ATTLIST remove data CDATA #REQUIRED side ( start | end ) #REQUIRED > <!ELEMENT sub EMPTY> <!ATTLIST sub global CDATA #IMPLIED regexp CDATA #REQUIRED data CDATA #REQUIRED > <!ELEMENT trim EMPTY >