如何使用 xpointer 和 Xinclude 来引用元素 [英] How to use xpointer with Xinclude to reference elements

问题描述

我想将 2 个具有相同结构的 XML 文件合并成一个.例如;

I want to merge 2 XML files with the same structure to make one. For example;

Test1.xml

<?xml version="1.0" encoding="UTF-8"?>

<ns:Root
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ns="urn:TestNamespace"
    xsi:schemaLocation="urn:Test.Namespace Test1.xsd"
    >
    <ns:element1 id="001">
       <ns:element2 id="001.1" order="1">
           <ns:element3 id="001.1.1" />
       </ns:element2>
       <ns:element2 id="001.2" order="2">
           <ns:element3 id="001.1.2" />
       </ns:element2>
    </ns:element1>
</ns:Root>

和Test2.xml

<?xml version="1.0" encoding="UTF-8"?>

<ns:Root
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ns="urn:TestNamespace"
    xsi:schemaLocation="urn:Test.Namespace Test1.xsd"
    >
    <ns:element1 id="999">
        <ns:element2 id="999.1" order="1">
            <ns:element3 id="999.1.1" />
        </ns:element2>
    </ns:element1>
</ns:Root>

创建

TestOutput.xml

<?xml version="1.0" encoding="UTF-8"?>

<ns:Root
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ns="urn:TestNamespace"
    xsi:schemaLocation="urn:Test.Namespace Test1.xsd"
    >
    <ns:element1 id="001">
       <ns:element2 id="001.1" order="1">
           <ns:element3 id="001.1.1" />
       </ns:element2>
       <ns:element2 id="001.2" order="2">
           <ns:element3 id="001.1.2" />
       </ns:element2>
    </ns:element1>
    <ns:element1 id="999">
        <ns:element2 id="999.1" order="1">
            <ns:element3 id="999.1.1" />
        </ns:element2>
    </ns:element1>
</ns:Root>

即一个 XML 文件，其中包含每个文件中的所有元素.

ie one XML file with all the elements from each included.

我在 StackOverflow 上发现了一个有用的问题，并提出了这个问题；

I found a useful question on StackOverflow, and came up with this;

合并.xml

<?xml version="1.0"?>

<ns:Root xmlns:xi="http://www.w3.org/2003/XInclude"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ns="urn:TestNamespace">

    <xi:include href="Test1.xml" parse="xml" xpointer="element(//ns:Root/ns:element1)" />  

    <xi:include href="Test2.xml" parse="xml" xpointer="element(//ns:Root/ns:element1)" />

</ns:Root>

我通过这样做来运行(我需要使用 xmllint 的原因)

Which I run by doing this (I need to use xmllint for reasons to involved to go into)

xmllint -xinclude Merge.xml

xmllint -xinclude Merge.xml

但这不起作用，它抱怨各种 thongs，这似乎与 xpointer 有关.

But this does not work, it complains about various thiongs, which seem to relate to xpointer.

parser error : warning: ChildSeq not starting by /1
Merge.xml:7: element include: XInclude error : XPointer evaluation failed: #element(//ns:Root/ns:element1)
Merge.xml:7: element include: XInclude error : could not load Test1.xml, and no fallback was found
parser error : warning: ChildSeq not starting by /1
Merge.xml:9: element include: XInclude error : XPointer evaluation failed: #element(//ns:Root/ns:element1)
Merge.xml:9: element include: XInclude error : could not load Test2.xml, and no fallback was found
<?xml version="1.0"?>
<ns:Root xmlns:xi="http://www.w3.org/2003/XInclude" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns="urn:TestNamespace">

    <xi:include href="Test1.xml" parse="xml" xpointer="element(//ns:Root/ns:element1)"/>

    <xi:include href="Test2.xml" parse="xml" xpointer="element(//ns:Root/ns:element1)"/>

</ns:Root>

如果我在 Merge.xml 中省略 xpointer 属性，那么我会得到一些合理的输出，但它所做的不仅仅是包含我当然想要的元素.

If I omit the xpointer attributes in Merge.xml then I get some sensible output, but it has done more than include the elements I want of course.

有人可以就我在 xpointer 上做错的地方提供一些建议吗?

Can someone offer some advice as to what I am doing wrong with xpointer please?

期待中的感谢.

推荐答案

我已经对这个有了更多的了解，并在网上找到了很多表明我所做的事情是正确的例子.这是一个工作版本...

I have dabbled with this a bit more, and found plenty of examples on the web that suggest what I am doing is correct.This is now a working version...

<?xml version="1.0"?>

<Root xmlns:xi="http://www.w3.org/2003/XInclude"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ns="http://testurl.com/now">

    <xi:include href="Test1.xml" xpointer="xmlns(ns=http://testurl.com/now)xpointer(/ns:Root/ns:element1)" parse="xml" />
    <xi:include href="Test2.xml" xpointer="xpointer(//Root/element1)" parse="xml" />

</Root>

此示例使用了具有命名空间的 Test1.xml 版本，而没有的 Test2.xml 版本.

This example uses a version of Test1.xml which has namespaces, and Test2.xml which does not.

输出现在看起来像这样......

The output now looks like this....

<?xml version="1.0"?>
<Root xmlns:xi="http://www.w3.org/2003/XInclude" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns="http://testurl.com/now">

    <ns:element1 xmlns:ns="http://testurl.com/now" id="001">
        <ns:element2 id="001.1" order="1">
            <ns:element3 id="001.1.1"/>
        </ns:element2>
        <ns:element2 id="001.2" order="2">
            <ns:element3 id="001.1.2"/>
        </ns:element2>
    </ns:element1><ns:element1 xmlns:ns="http://testurl.com/now" id="003">
        <ns:element2 id="007.0" order="1">
            <ns:element3 id="007.1.1"/>
        </ns:element2>
    </ns:element1><ns:element1 xmlns:ns="http://testurl.com/now" id="002">
        <ns:element2 id="002.1" order="3">
            <ns:element3 id="002.1.1"/>
        </ns:element2>
        <ns:element2 id="002.2" order="4">
            <ns:element3 id="002.1.2"/>
        </ns:element2>
    </ns:element1>
    <element1 id="999">
        <element2 id="999.1" order="1">
            <element3 id="999.1.1"/>
        </element2>
    </element1>

</Root>

这当然是可以接受的，如果element1的open和close之间的换行还在那里就好了

This is of course acceptable, it would be nice if the line breaks between the open and close of element1 were still there

这篇关于如何使用 xpointer 和 Xinclude 来引用元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！