Xsd 和继承 [英] Xsd and inheritance

问题描述

我有一个这样的 xsd

I have an xsd like this

<xsd:complexType name="A">  
        <xsd:complexContent>  
            <xsd:sequence>  
                <xsd:element name="options">  
                    <xsd:complexType>  
                        <xsd:sequence>  
                            <xsd:element name="Day">  
                            ...  
                            </xsd:element>  
                        </xsd:sequence>  
                    </xsd:complexType>  
                </xsd:element>  
            </xsd:sequence>  
        </xsd:complexContent>  
</xsd:complexType>  

<xsd:complexType name="B">  
    <xsd:complexContent>
        <xsd:extension base="A">
        ...What would go here...
        </xsd:extension>
    </xsd:complexContent>
</xsd:complexType>  

所以基本上我希望 A 类有一系列选项(例如天、周)，然后我希望 B 从 A 继承并拥有 A 的所有选项和额外的 2 或 3 个选项，如小时、秒.

So basically I want class A to have a sequence of options (Day, Week for example) then I want B to inherit from A and have all of A's options and an additional 2 or 3 options like hours, seconds.

推荐答案

这是我想出的架构:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="inheritance"
    targetNamespace="http://test.com"
    elementFormDefault="qualified"
    xmlns="http://www.w3.org/2001/XMLSchema"
    xmlns:test="http://test.com"
>
    <xs:element name="Time">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="First" type="test:A" />
                <xs:element name="Second" type="test:B" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>

    <xs:complexType name="shortOptions">
        <xs:sequence>
            <xs:element name="Day" />
        </xs:sequence>
    </xs:complexType>

    <xs:complexType name="longOptions">
        <xs:complexContent>
            <xs:extension base="test:shortOptions">
                <xs:sequence>
                    <xs:element name="Week" />
                </xs:sequence>
            </xs:extension>
        </xs:complexContent>
    </xs:complexType>

    <xs:complexType name="A">
        <xs:sequence>
            <xs:element name="options" type="test:shortOptions" />
        </xs:sequence>
    </xs:complexType>

    <xs:complexType name="B">
        <xs:sequence>
            <xs:element name="options" type="test:longOptions" />
        </xs:sequence>
    </xs:complexType>

</xs:schema>

这似乎适合这个xml:

Which seems to fit this xml:

<?xml version="1.0" encoding="utf-8" ?>
<Time xmlns="http://test.com">
    <First>
        <options>
            <Day>Today</Day>
        </options>
    </First>
    <Second>
        <options>
            <Day>Tomorrow</Day>
            <Week>This Week</Week>
        </options>
    </Second>
</Time>

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