Give Relational Schema To Represent Bibliographical

Consider as shown below, and suppose that authors could also appear as top level elements. What change would have to be done to the relational schema?

<!DOCTYPE bibliography [

<!ELEMENT book (title, author+, year, publisher, place?)>

<!ELEMENT article (title, author+, journal, year, number, volume, pages?)>

<!ELEMENT author ( last-name, first-name) >

<!ELEMENT title ( #PCDATA )>

· · · similar PCDATA declarations for year, publisher, place, journal, year,

number, volume, pages, last-name and first-name

] >

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