1. Database Application Design
Winter 2004
Dragomir R. Radev
© 2002 by Prentice Hall

2. XQuery
© 2002 by Prentice Hall

3. Background Successor to XML-QL, YAML, Lorel, Quilt
Supported by the W3C
Draft only
© 2002 by Prentice Hall

4. DTD <!ELEMENT bib (book* )>
<!ELEMENT book (title, (author+ | editor+ ), publisher, price )>
<!ATTLIST book year CDATA #REQUIRED >
<!ELEMENT author (last, first )>
<!ELEMENT editor (last, first, affiliation )>
<!ELEMENT title (#PCDATA )>
<!ELEMENT last (#PCDATA )>
<!ELEMENT first (#PCDATA )>
<!ELEMENT affiliation (#PCDATA )>
<!ELEMENT publisher (#PCDATA )>
<!ELEMENT price (#PCDATA )>
© 2002 by Prentice Hall

5. Sample database © 2002 by Prentice Hall <bib>
<book year="1994">
<title>TCP/IP Illustrated</title>
<author>
<last>Stevens</last>
<first>W.</first>
</author>
<publisher>Addison-Wesley</publisher>
<price> 65.95</price>
</book>
<book year="1992">
<title>Advanced Programming in the Unix environment</title>
<price>65.95</price>
<book year="2000">
<title>Data on the Web</title>
<last>Abiteboul</last>
<first>Serge</first></author>
<last>Buneman</last>
<first>Peter</first>
<last>Suciu</last>
<first>Dan</first>
<publisher>Morgan Kaufmann Publishers</publisher>
<price>39.95</price>
</bib>
© 2002 by Prentice Hall

6. Sample query <bib> {
for $b in document("
where
$b/publisher = "Addison-Wesley“
and
> 1991
return
<book year="{ }">
{ $b/title }
</book> }
</bib>
© 2002 by Prentice Hall

7. Expected result <bib> <book year="1994">
<title>TCP/IP Illustrated</title>
</book>
<book year="1992">
<title>Advanced Programming in the Unix environment</title>
</bib>
© 2002 by Prentice Hall

8. Pointers and Demos http://www.w3.org/TR/xquery/
© 2002 by Prentice Hall