我怎样才能简单地使用这个 xpath 以便 xmlstartlet 可以使用它？
$ xmlstarlet sel -t -c "//str[@name="id" and .="http://localhost:8080/index.html"]/../str[@name="doc-norm"]"/value results.xml
我的理解是 xmlstarlet 不完全支持 xpath 表达式。顺便说一句，还有其他命令行工具吗？
<doc>
<str name="id">http://localhost:8080/index.html</str>
<str name="doc-norm">6</str>
</doc>
$ xmlstarlet sel -t -c "//str[@name="id" and .="http://localhost:8080/index.html"]/../str[@name="doc-norm"]"/value results.xml
My understanding is that xmlstarlet doesn't fully support xpath expressions. Is there any other command-line tool that does BTW?
<doc>
<str name="id">http://localhost:8080/index.html</str>
<str name="doc-norm">6</str>
</doc>
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您是否尝试从示例中返回
6？我没有 xmlstarlet 来测试它，但尝试这个 XPath:
//*[str[@name='id']='http://localhost:8080/index.html']/str[ @name='doc-norm']这应该返回
str元素的值，该元素的name属性的值为doc-当其父元素具有子. （我希望这是有道理的！）str元素时，该子元素具有值为http://localhost:8080/index.norm的id属性。 html我还应该补充一点，如果您知道父元素的级别是什么，请尽量避免使用
//。类似/doc[str[@name='id']='http://localhost:8080/index.html']/str[@name='doc-norm']的内容是更有效率。更新
我下载了 xmlstartlet 进行测试，它工作正常，但它返回整个
str元素。如果您只需要文本，请将text()添加到 XPath 的末尾：//*[str[@name='id']='http://localhost:8080 /index.html']/str[@name='doc-norm']/text()Are you trying to return the
6from your example?I don't have xmlstarlet to test this on, but try this XPath:
//*[str[@name='id']='http://localhost:8080/index.html']/str[@name='doc-norm']This should return the value of a
strelement that has anameattribute with a value ofdoc-normwhen its parent element has a childstrelement that has anidattribute with a value ofhttp://localhost:8080/index.html. (I hope that makes sense!)I should also add that if you know what the level of the parent element is, try to avoid using the
//. Something like/doc[str[@name='id']='http://localhost:8080/index.html']/str[@name='doc-norm']would be more efficient.UPDATE
I downloaded xmlstartlet to test and it works fine, however it returns the entire
strelement. If you want the text only, addtext()to the end of the XPath://*[str[@name='id']='http://localhost:8080/index.html']/str[@name='doc-norm']/text()