<xsd:element maxOccurs="1" minOccurs="0" name="cursor">
<xsd:complexType>
<xsd:sequence />-------------->?
<xsd:attribute name="numRows" type="xsd:integer" />
<xsd:attribute name="id" type="xsd:double" />
<xsd:attribute name="position" type="xsd:integer" />
<xsd:attribute name="maxRows" type="xsd:integer" />
</xsd:complexType>
</xsd:element>
<xsd:sequence />
上述架构中的意义是什么?请帮忙。