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Chapter 5. Creating XML Schemas > Creating Element Groups
Creating Element Groups
Say that I wanted to let the borrower borrow not just books, but also a magazine. To do that, I can create a new group named booksAndMagazine. A group collects elements together, and you can name groups. You can then include a group in other elements using the <xsd:group> element and referring to the group by name:
<xsd:complexType name="transactionType">
<xsd:sequence>
<xsd:element name="Lender" type="address"/>
<xsd:element name="Borrower" type="address"/>
<xsd:element ref="note" minOccurs="0"/>
<xsd:choice>
<xsd:element name="books" type="books"/>
<xsd:element ref="book"/>
<xsd:group ref="booksAndMagazine"/>
<xsd:choice>
</xsd:sequence>
<xsd:attribute name="borrowDate" type="xsd:date"/>
</xsd:complexType>
