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Hi All,
I'm using key and keyref system to implement Primary and Foreign Key
relationships. I have tried everything; I'm using Apache Xerecs to validate
it. If I can implement the 'refDID' attribute in Employee to reference the
'DID' attribute in Division, I can do the rest myself. Any suggestions most
appreciated. Please have a look at the files inserted with my email. It will
not catch the deliberate errors I have introduced.
Thanks Marco Mastrocinque
<?xml version="1.0" encoding="UTF-8"?>
<companyInformationSystem xmlns="http://www.myexample/companyInformationSystem"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://www.myexample/companyInformationSystem
company.xsd">
<Divisions>
<Division DID="Mar">
<DName>Marketing</DName>
<Location>10th Floor - D Block</Location>
</Division>
<Division DID="Wmd">
<DName>Research and Development</DName>
<Location>12th Floor - A Block</Location>
</Division>
</Divisions>
<Employess>
<Employee EID="S12345" refDID="Marr">
<ENAME>Marco Mastrocinque</ENAME>
<OFFICE>1204</OFFICE>
<BIRTHDATE>07061970</BIRTHDATE>
<SALARY>650000</SALARY>
</Employee>
<Employee EID="XXXXXX" refDID="xxx">
<ENAME>John Smith</ENAME>
<OFFICE>12th Floor - A Block</OFFICE>
<BIRTHDATE>07011969</BIRTHDATE>
<SALARY>50000</SALARY>
</Employee>
</Employess>
<Projects>
<Project PID="M34" refDID="Mar">
<PNAME>Just Jeans commercial</PNAME>
<BUDGET>650000</BUDGET>
</Project>
</Projects>
<Assigns>
<Assign refDID="Mar" refEID="S12345">
<HOURS>0012</HOURS>
</Assign>
</Assigns>
</companyInformationSystem>
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; xmlns="http://www.myexample/companyInformationSystem"; xmlns:c="http://www.myexample/companyInformationSystem"; targetNamespace="http://www.myexample/companyInformationSystem"; elementFormDefault="qualified">
<!--The root element companyIformationSystem -->
<xs:element name="companyInformationSystem">
<xs:annotation>
<xs:documentation>This is the root element of the XML file. Assignment done by Marco Mastrocinque (s8812209), Bill Kascamanidis (s5391490) and Alex Filip (s4035542).</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<!--The first major subgroup Divisions -->
<xs:element name="Divisions">
<xs:complexType>
<xs:sequence>
<!--The subgroup Division -->
<xs:element ref="Division" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<!--Declare DID as unique -->
<!--This part part works -->
<xs:unique name="divisionIDNumber">
<xs:selector xpath="c:Division"/>
<xs:field xpath="@DID"/>
</xs:unique>
</xs:element>
<!--The second major subgroup Employess-->
<xs:element name="Employess">
<xs:complexType>
<xs:sequence>
<!--The subgroup Employee-->
<xs:element ref="Employee" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<!--Declare the combination of EID and refDID is unique -->
<!--This part works -->
<xs:unique name="employeeEIDandrefDID">
<xs:selector xpath="c:Employee"/>
<xs:field xpath="@EID"/>
</xs:unique>
<!--This is where you reference the DID attribute (Foreign Key) in the Division subgroup -->
<xs:keyref name="RefEmployeeToDivision" refer="KeyEmployeeByDivisionID">
<xs:selector xpath="c:Employees/c:Employee"/>
<xs:field xpath="@refDID"/>
</xs:keyref>
<!-- The Primary Key the DID attribute in the Employee subgroup -->
<xs:key name="KeyEmployeeByDivisionID">
<xs:selector xpath="c:Divisions/c:Division"/>
<xs:field xpath="@DID"/>
</xs:key>
</xs:element>
<!--The third major subgroup Projects -->
<xs:element name="Projects">
<xs:complexType>
<xs:sequence>
<!--The subgroup Project -->
<xs:element ref="Project" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<!--This is the fouth and major subgroup Assigns -->
<xs:element name="Assigns">
<xs:complexType>
<xs:sequence>
<xs:element ref="Assign" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<!--This is the Division subgroup -->
<xs:element name="Division">
<xs:complexType>
<xs:sequence>
<xs:element name="DName" type="xs:string"/>
<xs:element name="Location" type="xs:string"/>
</xs:sequence>
<xs:attribute name="DID" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
<!--This is the Employee subgroup -->
<xs:element name="Employee">
<xs:complexType>
<xs:sequence>
<xs:element name="ENAME" type="xs:string"/>
<xs:element name="OFFICE" type="xs:string"/>
<xs:element name="BIRTHDATE" type="xs:string"/>
<xs:element name="SALARY" type="xs:integer"/>
</xs:sequence>
<xs:attribute name="EID" type="xs:string" use="required"/>
<xs:attribute name="refDID" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
<!--This is the Project subgroup -->
<xs:element name="Project">
<xs:complexType>
<xs:sequence>
<xs:element name="PNAME" type="xs:string"/>
<xs:element name="BUDGET" type="xs:integer"/>
</xs:sequence>
<xs:attribute name="PID" type="xs:string" use="required"/>
<xs:attribute name="refDID" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
<!--This is the Assign subgroup -->
<xs:element name="Assign">
<xs:complexType>
<xs:sequence>
<xs:element name="HOURS" type="xs:integer"/>
</xs:sequence>
<xs:attribute name="refDID" type="xs:string" use="required"/>
<xs:attribute name="refEID" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
</xs:schema>
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