XML/XML Schema/Russian Doll

Russian Doll Design with attributes

File: Data.xml

<?xml version="1.0"?>
<Books xmlns="http://www.wbex.ru"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
        <Book Category = "autobiography" InStock = "true" Reviewer = "R1">
                <Title>title 1</Title>
                <Author>author 1</Author>
                <Date>2008</Date>
                <ISBN>1-11111-111-1</ISBN>
                <Publisher>Publisher 1</Publisher>
        </Book>
        <Book Category = "fiction" InStock = "false" Reviewer = "R2">
                <Title>title 2</Title>
                <Author>author 2</Author>
                <Date>2007</Date>
                <ISBN>0-111-11111-1</ISBN>
                <Publisher>Publisher 2</Publisher>
        </Book>
        <Book Category = "non-fiction" Reviewer = "R3">
                <Title>title 3</Title>
                <Author>author 3</Author>
                <Date>2004</Date>
                <ISBN>0-11-111111-1</ISBN>
                <Publisher>Publisher 3</Publisher>
        </Book>
</Books>

File: Schema.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://www.wbex.ru"
            xmlns="http://www.wbex.ru"
            elementFormDefault="qualified">
    <xsd:element name="Books">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="Book" maxOccurs="unbounded">
                    <xsd:complexType>
                        <xsd:sequence>
                            <xsd:element name="Title" type="xsd:string"/>
                            <xsd:element name="Author" type="xsd:string" maxOccurs="unbounded"/>
                            <xsd:element name="Date" type="xsd:string"/>
                            <xsd:element name="ISBN" type="xsd:string"/>
                            <xsd:element name="Publisher" type="xsd:string"/>
                        </xsd:sequence>
                        <xsd:attribute name="Category" use="required">
                            <xsd:simpleType>
                                <xsd:restriction base="xsd:string">
                                    <xsd:enumeration value="autobiography"/>
                                    <xsd:enumeration value="non-fiction"/>
                                    <xsd:enumeration value="fiction"/>
                                </xsd:restriction>
                            </xsd:simpleType>
                        </xsd:attribute> 
                        <xsd:attribute name="InStock" type="xsd:boolean" default="false"/>
                        <xsd:attribute name="Reviewer" type="xsd:string" default="none"/>
                    </xsd:complexType>
                </xsd:element>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>

Russian Doll style

File: Data.xml
<?xml version="1.0"?>
<Books xmlns="http://www.wbex.ru"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
        <Book>
                <Title>title 1</Title>
                <Author>author 1</Author>
                <Date>2008</Date>
                <ISBN>1-11111-111-1</ISBN>
                <Publisher>Publisher 1</Publisher>
        </Book>
        <Book>
                <Title>title 2</Title>
                <Author>author 2</Author>
                <Date>2007</Date>
                <ISBN>0-111-11111-1</ISBN>
                <Publisher>Publisher 2</Publisher>
        </Book>
</Books>
File: Schema.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://www.wbex.ru"
            xmlns="http://www.wbex.ru"
            elementFormDefault="qualified">
    <xsd:element name="Books">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="Book" maxOccurs="unbounded">
                    <xsd:complexType>
                        <xsd:sequence>
                            <xsd:element name="Title" type="xsd:string"/>
                            <xsd:element name="Author" type="xsd:string"/>
                            <xsd:element name="Date" type="xsd:string"/>
                            <xsd:element name="ISBN" type="xsd:string"/>
                            <xsd:element name="Publisher" type="xsd:string"/>
                        </xsd:sequence>
                    </xsd:complexType>
                </xsd:element>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>

With the Russian Doll Design, the schema mirrors the structure of the instance document

File: Data.xml
<?xml version = "1.0" ?>
<Customer xmlns = "http://www.wbex.ru/Customers"
          customerID = "2442"
          clubCardMember = "true" >
   <FirstName>first</FirstName>
   <MiddleInitial>middle</MiddleInitial>
   <LastName>last</LastName>
</Customer>
File: Schema.xsd
<?xml version = "1.0" ?> 
<schema xmlns = "http://www.w3.org/2001/XMLSchema"
        targetNamespace = "http://www.wbex.ru/Customers"
        xmlns:cust = "http://www.wbex.ru/Customers"
        elementFormDefault = "qualified"
        attributeFormDefault = "unqualified">
   
   <element name = "Customer">
      <complexType>
         <sequence>
             <element name = "FirstName" type = "string" />
             <element name = "MiddleInitial" type = "string" minOccurs = "0" maxOccurs = "1" />
             <element name = "LastName" type = "string" />
         </sequence>
         <attribute name = "customerID" use = "required" type = "integer" />
         <attribute name = "clubCardMember" type = "boolean" />
      </complexType>
   </element>
   
</schema>