Question

我的XML DTD如下：

<!DOCTYPE Bookstore [
<!ELEMENT Bookstore (Book | Magazine)*>
<!ELEMENT Book (Title, Authors, Remark?)>
<!ATTLIST Book ISBN CDATA #REQUIRED
              Price CDATA #REQUIRED
              Edition CDATA #REQUIRED>
<!ELEMENT Magazine (Title)>
<!ATTLIST Magazine Month CDATA #REQUIRED Year CDATA #REQUIRED> 
<!ELEMENT Title (#PCDATA)>
<!ELEMENT Authors (Author+)>
<!ELEMENT Remark (#PCDATA)>
<!ELEMENT Author (First_Name, Last_Name)>
<!ELEMENT First_Name (#PCDATA)>
<!ELEMENT Last_Name (#PCDATA)>
]>

我想运行以下查询：

Title Book whose title is the same as title of a magazine.

我无法想办法运行这个查询。任何人请帮助我，我会感激不尽。

Answer 1

您可以尝试这样的事情：

 add  $5,$2,$3
 addi $5,$5,20
 sub  $5,$1,$5
 sub  $5,$5, $4
 sw   $5,0($5)

在xpath之上返回//Bookstore/Book/Title[. = //Magazine/Title]子项的所有<Title>元素，其值等于<Book>的至少一个<Title>。

Answer 2

您可以尝试以下方法：

//Bookstore/Book[Title = ../Magazine/Title]/Title

X-Path查询问题

2 个答案: