中文XML论坛--[求助]各位大哥，我想问问关于group和attributegroup在schemal中的用法

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各位大哥：
我想问问关于group和attributegroup在schemal中的用法。
谢了

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我也存在同样的问题

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group Element

The group element enables you to group together element declarations.
Note: the group element is just for grouping together element declarations, no attribute declarations allowed!

<xsd:element name="Book" >
      <xsd:complexType>
                <xsd:sequence>
                         <xsd:group ref="PublicationElements"/>
                         <xsd:element name="ISBN" type="string"/>
                         <xsd:element name="Reviewer" type="string"/>
                </xsd:sequence>
      </xsd:complexType>
</xsd:element>
<xsd:element name="CD" >
      <xsd:complexType>
                <xsd:sequence>
                         <xsd:group ref="PublicationElements"/>
                         <xsd:element name="RecordingStudio" type="string"/>
                </xsd:sequence>
      </xsd:complexType>
</xsd:element>
<xsd:group name="PublicationElements">
        <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:sequence>
</xsd:group>

Following is error!!!!!

<xsd:element name="Book">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:group name="PublicationElements">
                    <xsd:sequence>
                        <xsd:element name="Title" type="xsd:string" minOccurs="0"/>
                        <xsd:element name="Author" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
                        <xsd:element name="Date" type="xsd:string"/>
                    </xsd:sequence>
                </xsd:group>
                <xsd:element name="ISBN" type="xsd:string"/>
                <xsd:element name="Publisher" type="xsd:string"/>
            </xsd:sequence>
            ...
        </xsd:complexType>
    </xsd:element>

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attributegroup:

<xsd:element name="BookStore">
        <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:attributeGroup ref="BookAttributes"/>
                    </xsd:complexType>
                </xsd:element>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
    <xsd:attributeGroup name="BookAttributes">
        <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=" "/>
    </xsd:attributeGroup>

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谢谢二楼的兄弟,看了有收获.


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