验证XML和DTD时出错

问题描述

我正在处理XML文件，但遇到问题。

I'm working on a XML file and I'm having issues with it.

这是DTD：

<!ELEMENT book (bookinfo,chapter*)>
<!ELEMENT chapter (title,section*)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT bookinfo (title,author,copyright)>
<!ELEMENT author (firstname,surname)>
<!ELEMENT copyright (year,holder)>
<!ENTITY % divers "para|programlisting|itemizedlist|orderedlist">
<!ELEMENT section (title,(%divers;)+)>
<!ELEMENT para (#PCDATA)>
<!ELEMENT programlisting (#PCDATA)>
<!ELEMENT holder (#PCDATA)>
<!ELEMENT surname (#PCDATA)>
<!ELEMENT firstname (#PCDATA)>
<!ELEMENT year (#PCDATA)>
<!ELEMENT itemizedlist (listitem+)>
<!ELEMENT orderedlist (listitem+)>
<!ELEMENT listitem (%divers;)+>

这是我到目前为止所做的（这部分的验证还可以）

Here's what I've done so far (Validation is okay with this part)

<?xml version="1.0" encoding='ISO-8859-1' standalone="no"?>
<!DOCTYPE book SYSTEM "simpledocbook.dtd">
<?xml-stylesheet href="docbook.xml" type="application/xml"?>
<book>
<bookinfo>
<title></title>
<author>
<firstname></firstname>
<surname></surname>
</author>
<copyright>
<year></year>
<holder></holder>
</copyright>
</bookinfo>
<chapter>
<title></title>
<section>
<title></title>
<para></para>
<programlisting></programlisting>
</section>
</chapter>
<chapter>
<title></title>
<section>
<title></title>
<para></para>
<programlisting></programlisting>
<itemizedlist></itemizedlist>
<orderedlist></orderedlist>
</section>
</chapter>
</book>

当我尝试添加项目列表时出现了我的问题，我不知道该把它放在哪里代码？我尝试将其放置在任何地方都会出现错误。

My problem occurs when I try to add itemlist, I don't know where I should put it in the code? Everything I try to put it somewhere I get errors.

你们能帮我找出为什么它不起作用吗？
非常感谢！

Can you guys help me finding why it doesn't work?Thanks a lot!

推荐答案

该部分的验证不正确。关于 itemizedlist 和 orderedlist 不完整的错误应该会出现。它们至少需要1个 listitem （听起来您正在尝试添加）。

Validation should not be ok with that part. You should be getting errors about itemizedlist and orderedlist being incomplete. They require at least 1 listitem (which it sounds like you're trying to add).

这里是一个修改过的有效版本：

Here's a modified version that is valid:

<!DOCTYPE book SYSTEM "simpledocbook.dtd">
<?xml-stylesheet href="docbook.xml" type="application/xml"?>
<book>
    <bookinfo>
        <title></title>
        <author>
            <firstname></firstname>
            <surname></surname>
        </author>
        <copyright>
            <year></year>
            <holder></holder>
        </copyright>
    </bookinfo>
    <chapter>
        <title></title>
        <section>
            <title></title>
            <para></para>
            <programlisting></programlisting>
        </section>
    </chapter>
    <chapter>
        <title></title>
        <section>
            <title></title>
            <para></para>
            <programlisting></programlisting>
            <itemizedlist>
                <listitem>
                    <para/>
                </listitem>
            </itemizedlist>
            <orderedlist>
                <listitem>
                    <para/>
                </listitem>
            </orderedlist>
        </section>
    </chapter>
</book>

我将空的 para 元素添加到 listitem ，因为至少需要以下一项： para ，节目列表，项目清单或订单清单

I added empty para elements to the listitem's because at least 1 of the following are required: para, programlisting, itemizedlist or orderedlist

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