<!ELEMENT movies (movie*)>
<!ELEMENT movie (title+, year, genre+, rating, votes)>
<!ATTLIST movie
    id CDATA #REQUIRED
    mpa-rating (G|NC-17|PG|PG-13|R) #IMPLIED>
<!ELEMENT title (#PCDATA)>
<!ATTLIST title
    xml:lang NMTOKEN #REQUIRED>
<!ELEMENT year (#PCDATA)>
<!ELEMENT genre (#PCDATA)>
<!ELEMENT rating (#PCDATA)>
<!ELEMENT votes (#PCDATA)>