如何使用xpointer从另一个文档链接到特定节点

Question

我有两个xml文件。我想引用另一个xml文件中的节点的值。

示例: 1.xml

<?xml version="1.0"?>
<catalog>
   <book id="bk101">
      <author>Gambardella, Matthew</author>
      <title>XML Developer's Guide</title>
      <genre>Computer</genre>
      <price>44.95</price>
      <publish_date>2000-10-01</publish_date>
      <description>An in-depth look at creating applications 
      with XML.</description>
   </book>
   <book id="bk102">
      <author>Ralls, Kim</author>
      <title>Midnight Rain</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-12-16</publish_date>
      <description>A former architect battles corporate zombies, 
      an evil sorceress, and her own childhood to become queen 
      of the world.</description>
   </book>
   <book id="bk103">
      <author>Corets, Eva</author>
      <title>Maeve Ascendant</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-11-17</publish_date>
      <description>After the collapse of a nanotechnology 
      society in England, the young survivors lay the 
      foundation for a new society.</description>
   </book>
</catalog>

2.xml是

<?xml version="1.0" encoding="ISO-8859-1"?>
<doc xmlns:xi="http://www.w3.org/2003/XInclude">
<xi:include href="1.xml" xpointer="bk101"/>
</doc>

当我执行2.xml时，我得到一个错误，说这个XML文件似乎没有任何与之相关的样式信息。文档树如下所示。

<doc><xi:include href="book.xml" xpointer="bk101"/></doc>

我能得到一些帮助来解决这个问题吗？

谢谢

Answer 1

使用虚拟样式表解决错误：

<?xml-stylesheet href="http://www.w3.org/StyleSheets/TR/W3C-REC.css"?>

使用DTD将book元素的ID属性声明为类型ID：

<!ATTLIST book id ID #IMPLIED>

将其另存为类似于ids.dtd的内容，然后在1.xml中使用文档类型来引用它：

<?xml version="1.0"?>
<!DOCTYPE id-list SYSTEM "ids.dtd">

参考

• xml:id Version 1.0
• XInclude:Fragment Example
• Associating Style Sheets with XML documents