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Commit 753870f0 authored by Goik Martin's avatar Goik Martin
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answers to questions handling

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Doc/course.xml
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......@@ -652,7 +652,7 @@ drwxr-xr-x 4 goik fb1prof 4096 Nov 8 22:04 ..
</chapter>
 
<chapter xml:id="basicXmlDataModels">
<title>Basic XML data models</title>
<title>Basic XML Schema</title>
 
<para>We would like to support a company's organization. We start
modeling employees. Each employee shall have the following
......@@ -1093,6 +1093,34 @@ WHERE ID=1</programlisting>
</callout>
</calloutlist>
 
<para>This allows for an arbitrary number of employee data
sets:</para>
<programlisting>&lt;employeeList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="employee.xsd"&gt;
&lt;employee&gt;
&lt;id&gt;21&lt;/id&gt;
&lt;givenName&gt;Bob&lt;/givenName&gt;
&lt;surname&gt;Hope&lt;/surname&gt;
&lt;birthday&gt;1982-07-22&lt;/birthday&gt;
&lt;sex&gt;m&lt;/sex&gt;
&lt;email&gt;hope@exploitation.com&lt;/email&gt;
&lt;phone&gt;1123-33244&lt;/phone&gt;
&lt;/employee&gt;
&lt;employee&gt;
&lt;id&gt;22&lt;/id&gt;
&lt;givenName&gt;Gill&lt;/givenName&gt;
&lt;surname&gt;Evans&lt;/surname&gt;
&lt;birthday&gt;1973-01-15&lt;/birthday&gt;
&lt;sex&gt;f&lt;/sex&gt;
&lt;email&gt;gill@flashmaster.com&lt;/email&gt;
&lt;phone&gt;9771-43421&lt;/phone&gt;
&lt;/employee&gt;
&lt;/employeeList&gt;</programlisting>
<qandaset>
<title>Adding a grammar to <tag
class="starttag">mediaFormat</tag>.</title>
......@@ -1797,9 +1825,7 @@ WHERE ID=1</programlisting>
<para>We may reference the above schema constructing a valid XML
instance:</para>
 
<programlisting language="xml">&lt;employee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="employeeAttrib.xsd"
<programlisting language="xml">&lt;employee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="employeeAttrib.xsd"
id = "21"
givenName = "Bob"
surname = "Hope"
......@@ -1871,11 +1897,121 @@ WHERE ID=1</programlisting>
applications may be more difficult than having the schema based on
<tag class="starttag">xs:element</tag> in the first place.</para>
 
<remark>Rule of thumb: Whenever you do consider a value to
possibly demand an inner structure choose &lt;xs:element&gt; in
favour of &lt;xs:attribute&gt;.</remark>
<remark>Rule of thumb: Whenever you do consider a value possibly
demanding an inner structure choose &lt;xs:element&gt; in favour
of &lt;xs:attribute&gt;.</remark>
</listitem>
</orderedlist>
<para><tag class="starttag">xs:attribute</tag> declarations offer an
optional attribute <code>use</code>:</para>
<programlisting>&lt;xs:element name="employee"&gt;
&lt;xs:complexType&gt;
...
&lt;xs:attribute name="email" type="xs:string" use="required"/&gt;
&lt;xs:attribute name="phone" type="xs:string" use="optional" default="12212-0"/&gt;
&lt;/xs:complexType&gt;
&lt;/xs:element&gt;</programlisting>
<qandaset>
<title>Attribute default choices</title>
<qandadiv>
<qandaentry xml:id="qanda_RequiredDefault">
<question>
<para>How does a <code>default = "..."</code> definition
coexists with <code>use="required"</code>?</para>
</question>
<answer>
<para>In the presence of <code>use="required"</code> a
<code>default = "..."</code> declaration is being
ignored.</para>
</answer>
</qandaentry>
<qandaentry xml:id="qand_IdElementOrAttribute">
<question>
<para>Which is a natural choice to implement id-like values as
being given in <xref linkend="fig_XsdEmployee"/>? Would you
prefer <tag class="starttag">xs:element</tag> or <tag
class="starttag">xs:attribute</tag>? Give reasons to explain
your choice.</para>
</question>
<answer>
<para>Database id values are simply numbers. Many relational
databases offer IDENTITY declarations to define at maximum one
element per table to become a data identity attribute,
typically the primary key. So there is and never will be an
inner structure and the value is unique per dataset. Thus <tag
class="starttag">xs:attribute</tag> in conjunction with
<code>use="required"</code> is a natural choice.</para>
</answer>
</qandaentry>
</qandadiv>
</qandaset>
</section>
<section xml:id="sec_Keys">
<title>Unique values</title>
<para>So far we know about types to ensure data integrity regarding
individual datasets. This however still permits all kind of
oddities:</para>
<figure xml:id="fig_DuplicateEmployeeValue">
<title>Duplicate value <code>id=21</code> for different
employees</title>
<programlisting>&lt;employeeList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="employee.xsd"&gt;
&lt;employee&gt;
&lt;id&gt;21&lt;/id&gt;
&lt;givenName&gt;Bob&lt;/givenName&gt;
...
&lt;/employee&gt;
&lt;employee&gt;
&lt;id&gt;21&lt;/id&gt; <emphasis role="bold">&lt;!-- Uups: id=21 again? --&gt;</emphasis>
&lt;givenName&gt;Gill&lt;/givenName&gt;
...
&lt;/employee&gt; ...</programlisting>
</figure>
<para>In analogy to<xref linkend="fig_SqlDdlEmployee"/> would like to
add the equivalent of a primary key to <xref
linkend="fig_ListOfEmployees"/>. XML Schema offers <tag
class="starttag">xs:key</tag> and <tag
class="starttag">xs:unique</tag> declarations for this purpose:</para>
<programlisting>&lt;xs:element name="employee"&gt;
&lt;xs:complexType&gt;
&lt;xs:sequence&gt;
&lt;xs:element name="id" type="xs:unsignedInt"/&gt;
&lt;xs:element name="givenName" type="xs:string"/&gt;
...
&lt;/xs:sequence&gt;
&lt;/xs:complexType&gt;
&lt;/xs:element&gt;
&lt;xs:element name="employeeList"&gt;
&lt;xs:complexType&gt;
&lt;xs:sequence&gt;
&lt;xs:element ref="employee" minOccurs="0" maxOccurs="unbounded"/&gt;
&lt;/xs:sequence&gt;
&lt;/xs:complexType&gt;
<emphasis role="bold">&lt;xs:key name="employeeId"&gt;</emphasis> <co
xml:id="co_Keydef"/>
<emphasis role="bold">&lt;xs:selector xpath="employee"/&gt;
&lt;xs:field xpath="id"/&gt;
&lt;/xs:key&gt;</emphasis>
&lt;/xs:element&gt;
</programlisting>
<para/>
</section>
</chapter>
 
......
lookup.txt 0 → 100644
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Kennedy's birthday, maybe othe pr´erson havin email and skype
regular expression for RFC E-Mail
contact ERManager for boolean 'false' problem
ws/Docbook/Extensions/Tdata/.gitignore 0 → 100644
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/qanda.gen.xml
ws/Docbook/Extensions/Tdata/lastAnswerId.xml 0 → 100644
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<lastAnswer id="q2"/>
ws/Docbook/Extensions/Tdata/qanda.xml 0 → 100644
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<?xml version="1.0" encoding="UTF-8"?>
<book version="5.0" xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns:m="http://www.w3.org/1998/Math/MathML"
xmlns:html="http://www.w3.org/1999/xhtml"
xmlns:db="http://docbook.org/ns/docbook">
<info>
<title/>
<author>
<personname><firstname/><surname/></personname>
<affiliation>
<orgname/>
</affiliation>
</author>
<pubdate/>
</info>
<part xml:id="part">
<title/>
<chapter xml:id="q">
<title>Some questions</title>
<qandaset>
<title>First question</title>
<qandadiv>
<qandaentry xml:id="q1">
<question>
<para>My first question</para>
</question>
<answer>
<para>My first answer</para>
</answer>
</qandaentry>
</qandadiv>
</qandaset>
</chapter>
<chapter xml:id="chap2">
<title>More questions</title>
<qandaset>
<title>Second question</title>
<qandadiv>
<qandaentry xml:id="q2">
<question>
<para>My Second question</para>
</question>
<answer>
<para>My Second answer</para>
</answer>
</qandaentry>
</qandadiv>
</qandaset>
<qandaset>
<title>Third question</title>
<qandadiv>
<qandaentry xml:id="q3">
<question>
<para>My Third question</para>
</question>
<answer>
<para>My Third answer</para>
</answer>
</qandaentry>
</qandadiv>
</qandaset>
</chapter>
</part>
</book>
ws/Docbook/Extensions/Xsl/docbook2docbook.xsl
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......@@ -4,11 +4,9 @@
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns="http://docbook.org/ns/docbook">
<xsl:variable name="generateIdPrefix">__sdwordm4342cs__</xsl:variable>
<xsl:param name="generateIdPrefix">__sdwordm4342cs__</xsl:param>
<xsl:output indent="no"/>
<xsl:variable name="lastAnswerId" select="document('lastAnswerId.xml',/)/lastAnswer/@id" />
<xsl:param name="lastAnswerId" select="document('lastAnswerId.xml',/)/lastAnswer/@id" />
......@@ -51,22 +49,17 @@
</para>
</xsl:template>
<xsl:template match="db:question">
<question>
<xsl:apply-templates select="*|text()"/>
<xsl:if test="preceding::db:qandaentry[@xml:id=$lastAnswerId]">
<para> Solution id='<xsl:value-of select="parent::db:qandaentry/@xml:id"/>' not yet published.</para>
</xsl:if>
</question>
</xsl:template>
<xsl:template match="db:answer">
<xsl:variable name="parentQandaentry" select="parent::qandaentry"/>
<xsl:if test="following::db:qandaentry[@xml:id=$lastAnswerId] or parent::db:qandaentry[@xml:id=$lastAnswerId]">
<xsl:copy-of select="."/>
</xsl:if>
<db:answer>
<xsl:choose>
<xsl:when test="following::db:qandaentry[@xml:id=$lastAnswerId] or parent::db:qandaentry[@xml:id=$lastAnswerId]">
<xsl:copy-of select="*"/>
</xsl:when>
<xsl:otherwise>
<para>Answer id='<xsl:value-of select="parent::db:qandaentry/@xml:id"/>' not yet published.</para>
</xsl:otherwise>
</xsl:choose>
</db:answer>
</xsl:template>
<xsl:template match="db:part">
......@@ -84,7 +77,6 @@
<col width="40%" />
<tr>
<th>Exercise title / page</th>
<th>Status of completion</th>
</tr>
<xsl:for-each select=".//db:qandaset/db:qandadiv/db:qandaentry">
......@@ -96,7 +88,6 @@
</xsl:attribute>
</xref>
</td>
<td/>
</tr>
</xsl:for-each>
......
ws/eclipse/Company/Sql/100/duplicateKey.xml 0 → 100644
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<?xml version="1.0" encoding="UTF-8"?>
<employeeList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="employee.xsd">
<employee>
<id>21</id>
<givenName>John</givenName>
<middleInitial>Fitzgerald</middleInitial>
<surname>Kennedy</surname>
<birthday>1928-07-22</birthday>
<sex>m</sex>
<email>kennedy@whitehouse.org</email>
</employee>
<employee>
<id>21</id>
<givenName>Gill</givenName>
<surname>Evans</surname>
<birthday>1973-01-15</birthday>
<sex>f</sex>
<email>gill@flashmaster.com</email>
<phone>9771-43421</phone>
</employee>
</employeeList>
\ No newline at end of file
ws/eclipse/Company/Sql/100/employee.xsd 0 → 100644
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<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" >
<xs:element name="employee">
<xs:complexType>
<xs:sequence>
<xs:element name="id" type="xs:unsignedInt"/>
<xs:element name="givenName" type="xs:string"/>
<xs:element name="middleInitial" type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="surname" type="xs:string"/>
<xs:element name="birthday" type="xs:string"/>
<xs:element name="sex" type="xs:string"/>
<xs:element name="email" type="xs:string"/>
<xs:element name="phone" type="xs:string" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="employeeList">
<xs:complexType>
<xs:sequence>
<xs:element ref="employee" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<xs:key name="employeeId">
<xs:selector xpath="employee"/>
<xs:field xpath="id"/>
</xs:key>
</xs:element>
</xs:schema>
\ No newline at end of file
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