xsd：具有可选属性的唯一

发布于 2024-10-05 13:14:39 字数 845 浏览 10 评论 0原文

我有这个 Xml 文件：

<objects>
  <object name="ID1" />
  <object name="ID2" />
  <object name="ID2" color="green" />
  <object name="ID3" color="green" />
<objects>

我想根据 XSD 架构验证该文件，以便 name 和 color 之间的组合在文档中是唯一的。

问题是，如果我使用：

<xs:unique name="UniqueObjectNameColor">
  <xs:selector xpath="./object" />
  <xs:field xpath="@name" />
  <xs:field xpath="@color" />
</xs:unique>

... 规则将忽略没有可选 color 属性的 object 元素。以下内容验证正确，但不应该验证。

  <object name="ID2" />
  <object name="ID2" />

您能否告诉我，当元素中不存在 color 属性时，如何指定强制执行唯一 name 和 color 组合的规则object，它检查name？

原文

I have this Xml file:

<objects>
  <object name="ID1" />
  <object name="ID2" />
  <object name="ID2" color="green" />
  <object name="ID3" color="green" />
<objects>

I would like to validate this against an XSD Schema, so that the combination between name and color are unique in the document.

The problem is that, if I use:

<xs:unique name="UniqueObjectNameColor">
  <xs:selector xpath="./object" />
  <xs:field xpath="@name" />
  <xs:field xpath="@color" />
</xs:unique>

... the rule will ignore object elements without the optional color attribute. The following validates correctly while it shouldn't.

  <object name="ID2" />
  <object name="ID2" />

Can you tell me how can I specify a rule that enforces unique name and color combinations and, when the color attribute is not present in the element object, it checks the name?

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美人迟暮 2024-10-12 13:14:39

使用 use 和 default 带或不带如下值：

    <element name="objects">
        <complexType>
            <sequence>
                <element name="object" maxOccurs="unbounded">
                    <complexType>
                        <attribute name="name" type="string" />
                        <attribute name="color" type="string" use="optional" default="noColor" />
                    </complexType>
                </element>
            </sequence>
        </complexType>
        <unique name="UniqueObjectNameColor">
            <selector xpath="tns:object" />
            <field xpath="@name" />
            <field xpath="@color" />
        </unique>
    </element>

</schema>

Use use and default with or without a value like:

    <element name="objects">
        <complexType>
            <sequence>
                <element name="object" maxOccurs="unbounded">
                    <complexType>
                        <attribute name="name" type="string" />
                        <attribute name="color" type="string" use="optional" default="noColor" />
                    </complexType>
                </element>
            </sequence>
        </complexType>
        <unique name="UniqueObjectNameColor">
            <selector xpath="tns:object" />
            <field xpath="@name" />
            <field xpath="@color" />
        </unique>
    </element>

</schema>

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随心而道 2024-10-12 13:14:39

老问题，但值得回答。每个元素可以使用多个唯一约束。这会做你想做的事：

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://www.example.org/xsdunique-with-optional-properties"
    xmlns:tns="http://www.example.org/xsdunique-with-optional-properties"
    elementFormDefault="qualified" attributeFormDefault="unqualified">

    <element name="objects">
        <complexType>
            <sequence>
                <element name="object" maxOccurs="unbounded">
                    <complexType>
                        <attribute name="name" type="string" />
                        <attribute name="color" type="string" />
                    </complexType>
                </element>
            </sequence>
        </complexType>
        <unique name="UniqueObjectName">
            <selector xpath="tns:object" />
            <field xpath="@name" />
        </unique>
        <unique name="UniqueObjectNameColor">
            <selector xpath="tns:object" />
            <field xpath="@name" />
            <field xpath="@color" />
        </unique>
    </element>

</schema>

Old question, but worth to be answered. You can use more than one unique constraint per element. This would do what you want:

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://www.example.org/xsdunique-with-optional-properties"
    xmlns:tns="http://www.example.org/xsdunique-with-optional-properties"
    elementFormDefault="qualified" attributeFormDefault="unqualified">

    <element name="objects">
        <complexType>
            <sequence>
                <element name="object" maxOccurs="unbounded">
                    <complexType>
                        <attribute name="name" type="string" />
                        <attribute name="color" type="string" />
                    </complexType>
                </element>
            </sequence>
        </complexType>
        <unique name="UniqueObjectName">
            <selector xpath="tns:object" />
            <field xpath="@name" />
        </unique>
        <unique name="UniqueObjectNameColor">
            <selector xpath="tns:object" />
            <field xpath="@name" />
            <field xpath="@color" />
        </unique>
    </element>

</schema>

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