如何使用在线资源验证 xml 和 dtd

Question

我想使用 http://www.xmlvalidation.com/ 来验证 xml 和 dtd，但在处理 dtd 时出错。我添加了 dtd，但它不起作用。我想知道缺少什么。我将这两个文件复制并粘贴到一页上（没有使用外部文件）。谢谢！

<Bookstore>
<Book ISBN = "ISBN-101" Price = "100" Authors = "JU JW">
    <Title>
        Introduction to Python
    </Title>    
</Book>
<Book ISBN = "ISBN-202" Price = "120" Authors = "HG JU JW">
    <Title>
        Digital Circuit Design
    </Title>
    <Remark>
        Amazon.com says: Buy this book bundled with
        <BookRef book = "ISBN-303" /> - a great deal!
    </Remark>       
</Book>

<Author Ident = "HG">
    <Firstname>Hector</Firstname>
    <Lastname>Garcia</Lastname>
</Author>
<Author Ident = "JU">
    <Firstname>Jeffrey</Firstname>
    <Lastname>Ullman</Lastname>
</Author>
<Author Ident = "JW">
    <Firstname>Jennifer</Firstname>
    <Lastname>Widom</Lastname>
</Author>

<!ELEMENT Bookstore(Book*, Author*)>
<!ELEMENT Book (Title, Remark?)>
<!ATTLIST Book ISBN ID #REQUIRED
          Price CDATA #REQUIRED
          Authors IDREFS #REQUIRED>

<!ELEMENT Title(#PCDATA)>
<!ELEMENT Remark(#PCDATA | BookRef)*>
<!ELEMENT BookRef EMPTY>
<!ATTLIST BokkRef book IDREF #REQUIRED>
<!ELEMENT Author(Firstname,Lastname)>
<!ATTLIST Author Ident ID #REQUIRED>
<!ELEMENT Firstname(#PCDATA)>
<!ELEMENT Lastname(#PCDATA)>

Answer 1

如果要合并 DTD 和 XML 实例，请添加 DOCTYPE 声明并将 DTD 声明放在内部子集中（添加 prolog）...

<!DOCTYPE Bookstore [
<!ELEMENT Bookstore (Book*, Author*)>
<!ELEMENT Book (Title, Remark?)>
<!ATTLIST Book ISBN ID #REQUIRED
          Price CDATA #REQUIRED
          Authors IDREFS #REQUIRED>

<!ELEMENT Title (#PCDATA)>
<!ELEMENT Remark (#PCDATA | BookRef)*>
<!ELEMENT BookRef EMPTY>
<!ATTLIST BookRef book IDREF #REQUIRED>
<!ELEMENT Author (Firstname,Lastname)>
<!ATTLIST Author Ident ID #REQUIRED>
<!ELEMENT Firstname (#PCDATA)>
<!ELEMENT Lastname (#PCDATA)>
]>
<Bookstore>
    <Book ISBN="ISBN-101" Price="100" Authors="JU JW">
        <Title>
            Introduction to Python
        </Title>    
    </Book>
    <Book ISBN="ISBN-202" Price="120" Authors="HG JU JW">
        <Title>
            Digital Circuit Design
        </Title>
        <Remark>
            Amazon.com says: Buy this book bundled with
            <BookRef book="ISBN-303"/> - a great deal!
        </Remark>       
    </Book>

    <Author Ident="HG">
        <Firstname>Hector</Firstname>
        <Lastname>Garcia</Lastname>
    </Author>
    <Author Ident="JU">
        <Firstname>Jeffrey</Firstname>
        <Lastname>Ullman</Lastname>
    </Author>
    <Author Ident="JW">
        <Firstname>Jennifer</Firstname>
        <Lastname>Widom</Lastname>
    </Author>
</Bookstore>

我修正了 DTD 声明中的一些拼写错误，但您的文件仍然存在 IDREF 无效（缺少相应 ID）的问题。

如何使用在线资源验证 xml 和 dtd

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