XML 架构:可以包含元素或文本的元素? [英] XML Schema: Element that can contain elements or text?

问题描述

如何定义可以包含纯文本或包含元素的元素?假设我想以某种方式允许这两种情况:

How would I define an element that can either contain plain text or contain elements? Say I wanted to somehow allow for both of these cases:

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

<xs:element name="field" type="xs:string" />

... 使这两个元素都有效:

... so that both these elements would be valid:

<field name="test_field_0">
    <subfield>Some text.</subfield>
</field>

<field name="test_field_1">Some more text.</field>

推荐答案

我不久前对此进行了一些研究，我发现的唯一解决方案是使用混合属性:

I did some research on this a while ago and the only solution I found was to used the mixed attribute:

<xs:element name="field">
    <xs:complexType mixed="true">
        <xs:sequence>
                <xs:element ref="subfield" minOccurs="0" maxOccurs="unbounded" />
        </xs:sequence>
        <xs:attribute name="name" type="xs:string" />
    </xs:complexType>
</xs:element>

遗憾的是，这也允许

<field name="test_field_0">
    Some text I'm sure you don't want.
    <subfield>Some text.</subfield>
    More text you don't want.
</field>

希望有人能给出更好的答案.

Hopefully someone will give a better answer.

这篇关于XML 架构:可以包含元素或文本的元素?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！