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XSD Elements Only

An elements-only complex type contains an element that contains only other elements.

Complex Types Containing Elements Only​

An XML element, "book", that contains only other elements:

<book>
    <title>A Great Book</title>
    <author>Tom Nolan</author>
    <publisher>Tutorial Reference</publisher>
</book>

You can define the "book" element in a schema, like this:

<xs:element name="book">
    <xs:complexType>
        <xs:sequence>
            <xs:element name="title"  type="xs:string"/>
            <xs:element name="author"  type="xs:string"/>
            <xs:element name="publisher"  type="xs:string"/>
        </xs:sequence>
    </xs:complexType>
</xs:element>
note

The <xs:sequence> tag means that elements defined ("title", "author", "publisher") must appear in that order inside a "book" element.

Or you can give the complexType element a name, and let the "book" element have a type attribute that refers to the name of the complexType

<xs:element name="book" type="bookinfo"/>

<xs:complexType name="bookinfo">
    <xs:sequence>
        <xs:element name="title"  type="xs:string"/>
        <xs:element name="author"  type="xs:string"/>
        <xs:element name="publisher"  type="xs:string"/>
    </xs:sequence>
</xs:complexType>

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