xmllint 验证错误“未找到 DTD"使用 XSD 时 [英] xmllint validation error "no DTD found" while using XSD

问题描述

我正在尝试使用 xmllint 来检查我的工作，同时开发一个基本的 XSD，即 XML Schema 模式.但是它给了我一个错误

I'm trying to use xmllint to check my work while developing a basic XSD i.e. XML Schema schema. However it's giving me an error

验证失败:未找到 DTD.

Validation failed: no DTD found.

我做错了什么?

我的 xmllint 命令:

My xmllint command:

xmllint --noout --valid --schema simple.xsd lucas-basic.xml
lucas-basic.xml:5: validity error : Validation failed: no DTD found !
        >
        ^
lucas-basic.xml validates

测试 XSD 文件:

<?xml version = "1.0" encoding = "UTF-8"?>
<!--Generated by XML Authority. Conforms to w3c http://www.w3.org/2001/XMLSchema-->
<xsd:schema xmlns:xsd = "http://www.w3.org/2001/XMLSchema">
        <xsd:element name = "vehicles">
                <xsd:complexType>
                        <xsd:sequence>
                                <xsd:element name = "nickname" type = "xsd:string" maxOccurs = "unbounded"/>
                        </xsd:sequence>
                </xsd:complexType>
        </xsd:element>
</xsd:schema>

测试 XML 文件:

<?xml version="1.0"?>
<vehicles
                xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
                xsi:noNamespaceSchemaLocation = "http://lucas.ucs.ed.ac.uk/xml-schema/xmlns/simple.xsd"
        >
        <nickname>Bog Hopper</nickname>
        <nickname>Wee Beastie</nickname>
        <nickname>Count Zero</nickname>
</vehicles>

xsi:noNamespaceSchemaLocation 处的 URL 确实返回了上述 XSD.另外，我下载了xsd文件并将其放入当前目录作为额外措施，但这似乎没有改变任何东西.

The URL at xsi:noNamespaceSchemaLocation does return the above XSD. Also, I downloaded the xsd file and put it into the current directory as an extra measure, but this didn't seem to have changed anything.

推荐答案

--valid 适用于 DTD，而非 XSD.

--valid is for DTDs, not XSDs.

这对你有用:

xmllint --noout --schema http://lucas.ucs.ed.ac.uk/xml-schema/xmlns/simple.xsd lucas-basic.xml

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