问题
I an trying to create an XSD, to define complex types to be referenced in other XSDs. So far so good. Within this XSD (playlist.xsd) I have one main complexType "playlistType". I want the playlistType to be able to contain multiple instances of an element of type 'secondaryEventType', which I am trying to define as a separate complexType within the same XSD file.
However, when I come to try to create the 'secondaryEvent' element within the 'playlistType' I am continuously getting the error message : "'secondaryEventType' must refer to an existing simple or complex type.". I have tried placing the definition of the 'secondaryEventType' both before and after the definition of the main 'playlistType', I have tried with and without the xs: prefix.
What am I doing wrong?
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsB="baseTypes" targetNamespace="playlist">
<xs:import namespace="baseTypes" schemaLocation="baseTypes.xsd"/>
<xs:complexType name="secondaryEventType">
<xs:sequence>
<xs:element name="type">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="graphic"/>
<xs:enumeration value="bug"/>
<xs:enumeration value="voiceover"/>
<xs:enumeration value="subtitle"/>
<xs:enumeration value="addInsertionAvail"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
<xs:complexType name="playlistType">
<xs:sequence>
<xs:element name="primaryEvent" minOccurs="1" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="eventID" type="xsB:guidType"/>
<xs:element name="eventTitle" type="xs:string"/>
<xs:element name="mediaID">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="2"/>
<xs:pattern value="\S+"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="SOM" type="xsB:timecodeType"/>
<xs:element name="DUR" type="xsB:timecodeType"/>
<xs:element name="transition" minOccurs="0">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="cut"/>
<xs:enumeration value="dissolve"/>
<xs:enumeration value="fade"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="transitionDuration" type="xsB:timecodeType" minOccurs="0"/>
<xs:element name="secondaryEvent" type="secondaryEventType" minOccurs="0" maxOccurs="unbounded"/>
<!-- Error occurs Here -->
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:schema>
回答1:
Reference the name of the playlistType
complex type using the namespace given by the XSD's targetNamespace
. Your updated, working XSD follows...
Stub baseTypes.xsd:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xsB="baseTypes"
targetNamespace="baseTypes">
<xs:complexType name="guidType"/>
<xs:complexType name="timecodeType"/>
</xs:schema>
Working main XSD:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xsB="baseTypes"
xmlns:pl="playlist"
targetNamespace="playlist">
<xs:import namespace="baseTypes" schemaLocation="baseTypes.xsd"/>
<xs:complexType name="secondaryEventType">
<xs:sequence>
<xs:element name="type">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="graphic"/>
<xs:enumeration value="bug"/>
<xs:enumeration value="voiceover"/>
<xs:enumeration value="subtitle"/>
<xs:enumeration value="addInsertionAvail"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
<xs:complexType name="playlistType">
<xs:sequence>
<xs:element name="primaryEvent"
minOccurs="1"
maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="eventID" type="xsB:guidType"/>
<xs:element name="eventTitle" type="xs:string"/>
<xs:element name="mediaID">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="2"/>
<xs:pattern value="\S+"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="SOM" type="xsB:timecodeType"/>
<xs:element name="DUR" type="xsB:timecodeType"/>
<xs:element name="transition" minOccurs="0">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="cut"/>
<xs:enumeration value="dissolve"/>
<xs:enumeration value="fade"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="transitionDuration"
type="xsB:timecodeType"
minOccurs="0"/>
<xs:element name="secondaryEvent"
type="pl:secondaryEventType"
minOccurs="0"
maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:schema>
来源:https://stackoverflow.com/questions/20760462/xsd-reference-a-type-defined-within-the-same-file