将元素限制为包含文本或子元素

另一个选择是使用继承。生成的XML没有那么漂亮,但您得到的正是您想要的内容:

<xsd:element name="field" type="field" abstract="true" />
<xsd:element name="subfield" type="xsd:string" /> 

<xsd:complexType name="field" abstract="true" />

<xsd:complexType name="subfield">
  <xsd:complexContent>
    <xsd:extension base="field">
      <xsd:sequence>
        <xsd:element ref="subfield" minOccurs="0" maxOccurs="unbounded" />
      </xsd:sequence>
      <xsd:attribute name="name" type="xsd:string" />
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

<xsd:complexType name="no-subfield">
  <xsd:complexContent mixed="true">
    <xsd:extension base="field">
      <xsd:attribute name="name" type="xsd:string" />
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

然后,生成的XML将包含以下内容(假设 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 在某处声明)

<field xsi:type="subfield">
  <subfield>your stuff here</subfield>
</field>

或

<field xsi:type="no-subfield">your other stuff</field>

<field xsi:type="subfield">
  Text you don't want
  <subfield>your stuff here</subfield>
  More text you don't want
</field>