XML解析错误：未组织好 行：3，列：19：<!ELEMENT bookinfo(publishers,authors,books)>
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE bookinfo[
<!ELEMENT bookinfo(publishers,authors,books)>

<!ELEMENT publishers(publisher+)>
<!ELEMENT publisher(pname,address)>
<!ATTLIST publisher publisherID ID #REQUIRED>
<!ELEMENT pname (#PCDATA)>
<!ELEMENT address (#PCDATA)>

<!ELEMENT authors(author+)>
<!ELEMENT author(aname,age,sex)>

<!ELEMENT aname (#PCDATA)>
<!ELEMENT age (#PCDATA)>
<!ELEMENT sex (#PCDATA)>

<!ELEMENT books(book * )>
<!ELEMENT book(title,price,year)>
<!ATTLIST book
publisher IDREF #REQUIRED
author IDREFS #REQUIRED
>
<!ELEMENT title (#PCDATA)>
<!ELEMENT price (#PCDATA)>
<!ELEMENT year ( #PCDATA)>
]>
<bookinfo>
<publishers>
<publisher publisherID="P001">
<pname>zhouko</pname>
<address>chuanhuiqu</address>
</publisher>
<publisher publisherID="P002">
<pname>BEIJING</pname>
<address>sicuan</address>
</publisher>
</publishers>

<authors>
<author authorID="a001">
<aname>wangchao</aname>
<age>23</age>
<sex>NAN</sex>
</author>

<author authorID="a002">
<aname>mahan</aname>
<age>23</age>
<sex>nv</sex>
</author>
</authors>
<books>
<book publisherID="p001" authorID="a001">
<title>inser xml</title>
<price>20</price>
<year>1998</year>
</book>
</books>

</bookinfo>
xml XML解析错误：未组织好?
[解决办法]
<!ELEMENT books空格 (book, *)>