sonnet.dtd

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<!-- sonnet.dtd                                        -->

<!-- sonnet is the root of the document                -->
<!ELEMENT sonnet  (author,title?,lines)>
<!-- the default sonnet type is "Shakespearean"        -->
<!ATTLIST sonnet  type (Shakespearean | Petrarchan)  
                       "Shakespearean">

<!-- author contains information about the author      -->
<!ELEMENT author  (lastName,firstName,nationality,
                   yearOfBirth?,yearOfDeath?)>

<!-- lastName, firstName, nationality, yearOfBirth,
     and yearOfDeath are all elements inside author. -->

<!ELEMENT lastName (#PCDATA)>
<!ELEMENT firstName (#PCDATA)>
<!ELEMENT nationality (#PCDATA)>
<!ELEMENT yearOfBirth (#PCDATA)>
<!ELEMENT yearOfDeath (#PCDATA)>

<!-- The title of the sonnet                           -->
<!ELEMENT title (#PCDATA)>

<!-- The lines element contains the 14 lines of the    
     sonnet.                                           -->
<!ELEMENT lines (line,line,line,line,
                 line,line,line,line,
                 line,line,line,line,
                 line,line)>

<!ELEMENT line (#PCDATA)>