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从DTDs转换到XML Schemas时元素和属性的变化
| [日期：2005-08-30] |
来源：有声教程网 作者：未知 |
[字体：大 中 小] |
| 从DTDs转换到XML Schemas时元素和属性的变化 |
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| DTD |
XML Schema |
<!ELEMENT ROOT (A,B) >
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<element name="ROOT">
<complexType content="elementOnly">
<element ref="t:A">
<element ref="t:B">
</complexType>
<element>
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<!ELEMENT ROOT (A|B) >
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<element name="ROOT">
<complexType content="elementOnly">
<choice>
<element ref="t:A">
<element ref="t:B">
</choice>
</complexType>
<element>
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<!ELEMENT ROOT (A|(B,C)) >
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<element name="ROOT">
<complexType content="elementOnly">
<choice>
<element ref="t:A">
<sequence>
<element ref="t:B">
<element ref="t:C">
</sequence>
</choice>
</complexType>
<element>
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<!ELEMENT ROOT (A?,B+,C*) >
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<element name="ROOT">
<complexType content="elementOnly">
<element ref="t:A" minOccurs="0">
<element ref="t:B" maxOccurs="unbounded">
<element ref="t:C" minOccurs="0" maxOccurs="unbounded">
</complexType>
<element>
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| DTD |
XML Schema |
<!ATTLIST ROOT
a CDATA #REQUIRED>
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<element name="ROOT">
<complexType content="elementOnly">
<attribute name="a" type="string" use="required"/>
</complexType>
<element>
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<!ATTLIST ROOT
a CDATA #IMPLIED>
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<element name="ROOT">
<complexType content="elementOnly">
<attribute name="a" type="string" use="optional"/>
</complexType>
<element>
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<!ATTLIST ROOT
a (x|y|z) #REQUIRED;>
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<element name="ROOT">
<complexType content="elementOnly">
<attribute name="a">
<simpleType base="string">
<enumeration value="x"/>
<enumeration value="y"/>
<enumeration value="z"/>
</simpleType>
</attribute>
</complexType>
<element>
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<!ATTLIST ROOT
a CDATA #FIXED "x">
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<element name="ROOT">
<complexType content="elementOnly">
<attribute name="a" type="string" use="fixed" value="x"/>
</complexType>
<element>
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