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Transcript 
Copyright © 2004 Pearson Education, Inc.
Chapter 26
XML and Internet
Databases
Copyright © 2004 Pearson Education, Inc.
FIGURE 26.1
Representing semistructured data as a graph.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-3
FIGURE 26.2
Part of an
HTML
document
representing
unstructured
data.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-4
FIGURE 26.3
A complex XML
element called
<projects>.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-5
FIGURE 26.4
An XML DTD file called projects.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-6
FIGURE 26.5
An XML schema file called company.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-7
FIGURE 26.5
(continued)
An XML schema file
called company.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-8
FIGURE 26.5
(continued)
An XML schema file
called company.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-9
FIGURE 26.5 (continued)
An XML schema file called company.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-10
FIGURE 26.6
An ER schema diagram for a simplified UNIVERSITY
database.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-11
FIGURE 26.7
Subset of the UNIVERSITY database schema needed for
XML document extraction.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-12
FIGURE 26.8
Hierarchical
(tree) view with
COURSE as the
root.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-13
FIGURE 26.9
XML schema document with COURSE as the root.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-14
FIGURE 26.10
Hierarchical (tree) view
with STUDENT as the
root.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-15
FIGURE 26.11
XML schema document with STUDENT as the root.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-16
FIGURE 26.12
Hierarchical (tree) view with SECTION as the root.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-17
FIGURE 26.13
Converting a graph with cycles into a hierarchical (tree)
structure.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-18
FIGURE 26.14
Some examples of XPath expressions on XML documents
that follow the XML schema file COMPANY in Figure 26.5.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-19
FIGURE 26.15
Some examples of XQuery queries on XML documents that
follow the XML schema file COMPANY in Figure 26.5.
Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
Slide 26-20
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