<xs:group name="Songs">
      <xs:element name="songTitle" type="xs:string" />
      <xs:element name="artist" type="xs:string" />
      <xs:element name="publisher" type="xs:string" />
  </xs:group>

<xs:attributeGroup name="Songs">
   <xs:attribute name="songTitle" type="xs:string" />
   <xs:attribute name="artist" type="xs:string" />
   <xs:attribute name="publisher" type="xs:string" />
</xs:attributeGroup>

Sequence group.

All elements in an XML file must occur in the order that the schema lists them. For example, OrderHeader requires the customerName first, then orderNumber, and then orderDate:

<xs:group name="OrderHeader">
   <xs:sequence>
      <xs:element name="customerName" type="xs:string" />
      <xs:element name="orderNumber" type="xs:number" />
      <xs:element name="orderDate" type="xs:date" />
   </xs:sequence>
</xs:group>

Choice group

. One element in the group can occur in an XML file. For example, the CustomerInfo group lists a choice of elements for the XML file:

<xs:group name="CustomerInfo">
   <xs:choice>
      <xs:element name="customerName" type="xs:string" />
      <xs:element name="customerID" type="xs:number" />
      <xs:element name="customerNumber" type="xs:integer" />
   </xs:choice>
</xs:group>

All group.

All elements must occur in the XML file or none at all. The elements can occur in any order. For example, CustomerInfo requires all or none of the three elements:

<xs:group name="CustomerInfo">
   <xs:all>
      <xs:element name="customerName" type="xs:string" />
      <xs:element name="customerAddress" type="xs:string" />
      <xs:element name="customerPhone" type="xs:string" />
   </xs:all>
</xs:group>