-- 作者：SYTDeath
-- 发布时间：1/24/2008 1:28:00 AM
-- [求助]关于schema中extensible的问题
问题：extensible文档中的element按照什么逻辑或方法对应源xml文档相关element的hierachy。下例中源文档的/actions和/transformations应用了extensibletype。在extensible文档中，所有的elements are on the top hierachy。我怎样知道（在extensible文档中）哪个element应该对映源文档中的/actions还是/transformations？ Thx in advance!! 源xml文档（rfc5025）： <?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="urn:ietf:params:xml:ns:common-policy"
xmlns:cp="urn:ietf:params:xml:ns:common-policy"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<!-- /ruleset -->
<xs:element name="ruleset">
<xs:complexType>
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:sequence>
<xs:element name="rule" type="cp:ruleType" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
</xs:element>
<!-- /ruleset/rule -->
<xs:complexType name="ruleType">
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:sequence>
<xs:element name="conditions" type="cp:conditionsType" minOccurs="0"/>
<xs:element name="actions" type="cp:extensibleType" minOccurs="0"/>
<xs:element name="transformations" type="cp:extensibleType" minOccurs="0"/>
</xs:sequence>
<xs:attribute name="id" type="xs:ID" use="required"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
<!-- //rule/conditions -->
<xs:complexType name="conditionsType">
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:choice maxOccurs="unbounded">
<xs:element name="identity"
type="cp:identityType" minOccurs="0"/>
<xs:element name="sphere"
type="cp:sphereType" minOccurs="0"/>
Schulzrinne, et al. Standards Track [Page 22]
RFC 4745 Common Policy February 2007
<xs:element name="validity"
type="cp:validityType" minOccurs="0"/>
<xs:any namespace="##other" processContents="lax"
minOccurs="0" maxOccurs="unbounded"/>
</xs:choice>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
<!-- //conditions/identity -->
<xs:complexType name="identityType">
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:choice minOccurs="1" maxOccurs="unbounded">
<xs:element name="one" type="cp:oneType"/>
<xs:element name="many" type="cp:manyType"/>
<xs:any namespace="##other" processContents="lax"/>
</xs:choice>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
<!-- //identity/one -->
<xs:complexType name="oneType">
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:sequence>
<xs:any namespace="##other" minOccurs="0" processContents="lax"/>
</xs:sequence>
<xs:attribute name="id" type="xs:anyURI" use="required"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
<!-- //identity/many -->
<xs:complexType name="manyType">
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="except" type="cp:exceptType"/>
<xs:any namespace="##other" minOccurs="0" processContents="lax"/>
</xs:choice>
<xs:attribute name="domain" use="optional" type="xs:string"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
<!-- //many/except -->
<xs:complexType name="exceptType">
<xs:attribute name="domain" type="xs:string" use="optional"/>
<xs:attribute name="id" type="xs:anyURI" use="optional"/>
</xs:complexType>
<!-- //conditions/sphere -->
<xs:complexType name="sphereType">
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:attribute name="value" type="xs:string" use="required"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
<!-- //conditions/validity -->
<xs:complexType name="validityType">
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:sequence minOccurs="1" maxOccurs="unbounded">
<xs:element name="from" type="xs:dateTime"/>
<xs:element name="until" type="xs:dateTime"/>
</xs:sequence>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
<!-- //rule/actions or //rule/transformations -->
<xs:complexType name="extensibleType">
<xs:complexContent>
<xs:restriction base="xs:anyType">
<xs:sequence>
<xs:any namespace="##other" processContents="lax"
minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
</xs:schema> Extensible XML文档（rfc4745）： <?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="urn:ietf:params:xml:ns:pres-rules" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:cr="urn:ietf:params:xml:ns:common-policy" xmlns:pr="urn:ietf:params:xml:ns:pres-rules" elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:import namespace="urn:ietf:params:xml:ns:common-policy"/>
<xs:simpleType name="booleanPermission">
<xs:restriction base="xs:boolean"/>
</xs:simpleType>
<xs:element name="service-uri-scheme" type="xs:token"/>
<xs:element name="class" type="xs:token"/>
<xs:element name="occurrence-id" type="xs:token"/>
<xs:element name="service-uri" type="xs:anyURI"/>
<xs:complexType name="provideServicePermission">
<xs:choice>
<xs:element name="all-services">
<xs:complexType/>
</xs:element>
<xs:sequence minOccurs="0" maxOccurs="unbounded">
<xs:choice>
<xs:element ref="pr:service-uri"/>
<xs:element ref="pr:service-uri-scheme"/>
<xs:element ref="pr:occurrence-id"/>
<xs:element ref="pr:class"/>
<xs:any namespace="##other" processContents="lax"/>
</xs:choice>
</xs:sequence>
</xs:choice>
</xs:complexType>
<xs:element name="provide-services" type="pr:provideServicePermission"/>
<xs:element name="deviceID" type="xs:anyURI"/>
<xs:complexType name="provideDevicePermission">
<xs:choice>
<xs:element name="all-devices">
<xs:complexType/>
</xs:element>
<xs:sequence minOccurs="0" maxOccurs="unbounded">
<xs:choice>
<xs:element ref="pr:deviceID"/>
<xs:element ref="pr:occurrence-id"/>
<xs:element ref="pr:class"/>
<xs:any namespace="##other" processContents="lax"/>
</xs:choice>
</xs:sequence>
</xs:choice>
</xs:complexType>
<xs:element name="provide-devices" type="pr:provideDevicePermission"/>
<xs:complexType name="providePersonPermission">
<xs:choice>
<xs:element name="all-persons">
<xs:complexType/>
</xs:element>
<xs:sequence minOccurs="0" maxOccurs="unbounded">
<xs:choice>
<xs:element ref="pr:occurrence-id"/>
<xs:element ref="pr:class"/>
<xs:any namespace="##other" processContents="lax"/>
</xs:choice>
</xs:sequence>
</xs:choice>
</xs:complexType>
<xs:element name="provide-persons" type="pr:providePersonPermission"/>
<xs:element name="provide-activities" type="pr:booleanPermission"/>
<xs:element name="provide-class" type="pr:booleanPermission"/>
<xs:element name="provide-deviceID" type="pr:booleanPermission"/>
<xs:element name="provide-mood" type="pr:booleanPermission"/>
<xs:element name="provide-place-is" type="pr:booleanPermission"/>
<xs:element name="provide-place-type" type="pr:booleanPermission"/>
<xs:element name="provide-privacy" type="pr:booleanPermission"/>
<xs:element name="provide-relationship" type="pr:booleanPermission"/>
<xs:element name="provide-status-icon" type="pr:booleanPermission"/>
<xs:element name="provide-sphere" type="pr:booleanPermission"/>
<xs:element name="provide-time-offset" type="pr:booleanPermission"/>
<xs:element name="provide-user-input">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="false"/>
<xs:enumeration value="bare"/>
<xs:enumeration value="thresholds"/>
<xs:enumeration value="full"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="provide-note" type="pr:booleanPermission"/>
<xs:element name="sub-handling">
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="block"/>
<xs:enumeration value="confirm"/>
<xs:enumeration value="polite-block"/>
<xs:enumeration value="allow"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:complexType name="unknownBooleanPermission">
<xs:simpleContent>
<xs:extension base="pr:booleanPermission">
<xs:attribute name="name" type="xs:string" use="required"/>
<xs:attribute name="ns" type="xs:string" use="required"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:element name="provide-unknown-attribute" type="pr:unknownBooleanPermission"/>
<xs:element name="provide-all-attributes">
<xs:complexType/>
</xs:element>
</xs:schema>
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