assign2 - The University of Michigan Dearborn Department of...

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1 The University of Michigan – Dearborn Department of Computer and Information Science CIS 562 Web Information Management Fall 2010 Assignment 2 Due: in class December 8, 2010 Total points: 30 One way to represent a relational database table as an XML document is to allow the document element to represent the table itself, and each row (tuple) inside the table to be represented by a nested element. Inside the tuple-elements, each column is in turn represented by a nested element. Columns that allow null values are represented by optional elements, and a missing element denotes a null value. Consider the following three table schemas: SAILORS(Sid , Sname, Rating, Age) BOATS(Bid , Bname, Color, Price) RESERVES(Sid, Bid , Date) We can use three separate documents named sailors.xml , boats.xml , and reserves.xml with the following DTDs to represent the above three tables: <!DOCTYPE sailors [ <!ELEMENT sailors (sailor_tuple*)> <!ELEMENT sailor_tuple (sid, sname, rating?, age)> <!ELEMENT sid
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assign2 - The University of Michigan Dearborn Department of...

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