1411365 DB Design and Implementation inventory.xml <?xml version=\"1.0\"?> <?xml

Question

1411365 DB Design and Implementation

inventory.xml

<?xml version="1.0"?>

<?xml-stylesheet type="text/xsl" href="myfile.xsl" ?>

<bookstore specialty="novel">

<book>

    <author>

      <first-name>Joe</first-name>

      <last-name>Bob</last-name>

      <award>Trenton Literary Review Honorable Mention</award>

    </author>

    <price>12</price>

</book>

<book>

    <author>

      <first-name>Mary</first-name>

      <last-name>Bob</last-name>

      <publication>Selected Short Stories</publication>

    </author>

    <editor>

      <first-name>Britney</first-name>

      <last-name>Bob</last-name>

    </editor>

    <price>55</price>

</book>

<magazine frequency="monthly">

    <price>2.50</price>

    <subscription price="24" per="year"/>

</magazine>

<book id="myfave">

    <author>

      <first-name>Toni</first-name>

      <last-name>Bob</last-name>

      <degree from="Trenton U">B.A.</degree>

      <degree from="Harvard">Ph.D.</degree>

      <award>Pulitzer</award>

      <publication>Still in Trenton</publication>

      <publication>Trenton Forever</publication>

    </author>

    <price intl="Canada" exchange="0.7">6.50</price>

    <excerpt>

      <p>It was a dark and stormy night.</p>

      <p>But then all nights in Trenton seem dark and

      stormy to someone who has gone through what

      <emph>I</emph> have.</p>

      <definition-list>

        <term>Trenton</term>

        <definition>misery</definition>

      </definition-list>

    </excerpt>

</book>

<my:book xmlns:my="uri:mynamespace" price="29.50">

    <my:title>Who's Who in Trenton</my:title>

    <my:author>Robert Bob</my:author>

</my:book>

</bookstore>

Explanation / Answer

Exercise 1.

a.            information hiding is the principle of segregation of the design decisions in a computer    program that are most likely to change, thus protecting other parts of the program from extensive modification if the design decision is changed.

c.             Persistent is permanent storage and transient is for memory.
Persistemt objects when call transient objets ,first it is
loaded into memory.After process a transient objects can be
stored as persitent objects in hard disk.

Exercise 2.

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