关闭标记上的XML DTD错误-验证错误

我正在使用

http://www.xmlvalidation.com/index.php

验证我的DTD，但它在XML结束标记上产生错误

XML:

---

如何处理DTD中的结束标记？

这与结束标记无关。您需要声明

book

的属性，并且需要修复

book

和

description

元素的模型

新DTD

<!ELEMENT books (book+)>
<!ELEMENT book (description)>
<!ATTLIST book
          title CDATA #REQUIRED
          imageurl CDATA #REQUIRED>
<!ELEMENT description (author, publisher, publishDate, ISBN10, ISBN13, blurb)>
<!ELEMENT author (#PCDATA)>
<!ELEMENT publisher (#PCDATA)>
<!ELEMENT publishDate (#PCDATA)>
<!ELEMENT ISBN10 (#PCDATA)>
<!ELEMENT ISBN13 (#PCDATA)>
<!ELEMENT blurb (#PCDATA)>

注意：我需要

标题

和

图像URL

属性。根据您的数据，您可能希望暗示它们

<?xml version="1.0" encoding="UTF-8"?>
<!ELEMENT books (book+)>
<!ELEMENT book (title, imageurl, description, author, publisher, publishDate, ISBN10, ISBN13, blurb)>
<!ELEMENT description (#PCDATA)>
<!ELEMENT author (#PCDATA)>
<!ELEMENT publisher (#PCDATA)>
<!ELEMENT publishDate (#PCDATA)>
<!ELEMENT ISBN10 (#PCDATA)>
<!ELEMENT ISBN13 (#PCDATA)>
<!ELEMENT blurb (#PCDATA)>

    4:  129 Attribute "imageurl" must be declared for element type "book".
    4:  129 Attribute "title" must be declared for element type "book".
    12: 19  The content of element type "description" must match "null".
    13: 10  The content of element type "book" must match "(title,imageurl,description,author,publisher,publishDate,ISBN10,ISBN13,blurb)".
    14: 129 Attribute "imageurl" must be declared for element type "book".
    14: 129 Attribute "title" must be declared for element type "book".
    22: 19  The content of element type "description" must match "null".
    23: 10  The content of element type "book" must match "(title,imageurl,description,author,publisher,publishDate,ISBN10,ISBN13,blurb)".

<!ELEMENT books (book+)>
<!ELEMENT book (description)>
<!ATTLIST book
          title CDATA #REQUIRED
          imageurl CDATA #REQUIRED>
<!ELEMENT description (author, publisher, publishDate, ISBN10, ISBN13, blurb)>
<!ELEMENT author (#PCDATA)>
<!ELEMENT publisher (#PCDATA)>
<!ELEMENT publishDate (#PCDATA)>
<!ELEMENT ISBN10 (#PCDATA)>
<!ELEMENT ISBN13 (#PCDATA)>
<!ELEMENT blurb (#PCDATA)>