xpath表达式：根据其他元素查找元素的值

Question

如果标题的值是“这是一个标题”，我想找到演示者的值

<AXFRoot>
    <MAObject type="default" mdclass="PROGRAM">
        <GUID dmname="">ID00001</GUID>
    </MAObject>
    <MVAttribute type="RUNDOWN" index="0" attribute="RUNDOWN" mdclass="PROGRAM" objectid="ID00001">
        <Meta name="TITLE" format="string">This is a title</Meta>
        <Meta name="AIRDATE" format="string">20201001194131</Meta>
        <Meta name="PAGE_NUMBER" format="string">01</Meta>
        <Meta name="PRESENTER" format="string">abcdef</Meta>
        <Meta name="AUDIO_TIME" format="string">0</Meta>
        <Meta name="TOTAL_TIME" format="string">0</Meta>
        <Meta name="ARCHIVE" format="string">0</Meta>
        <Meta name="MOS_TITLE" format="string" />
    </MVAttribute>
    <MVAttribute type="RUNDOWN" index="1" attribute="RUNDOWN" mdclass="PROGRAM" objectid="ID00001">
        <Meta name="TITLE" format="string">This is another title</Meta>
        <Meta name="AIRDATE" format="string">20201001194131</Meta>
        <Meta name="PAGE_NUMBER" format="string">01</Meta>
        <Meta name="PRESENTER" format="string">ghijkl</Meta>
        <Meta name="AUDIO_TIME" format="string">0</Meta>
        <Meta name="TOTAL_TIME" format="string">0</Meta>
        <Meta name="ARCHIVE" format="string">0</Meta>
        <Meta name="MOS_TITLE" format="string" />
    </MVAttribute>
</AXFRoot>

到目前为止我得到了，

//AXFRoot/MVAttribute[@type='RUNDOWN']/Meta[@name='TITLE' and text()='This is a title']

但这只给了我标题元素，而不是演示者的值。我需要添加什么？

Answer 1

你就快到了：

//AXFRoot/MVAttribute[@type='RUNDOWN']
                     /Meta[@name='TITLE' and text()='This is a title']
                     /../Meta[@name='PRESENTER']

或者

//AXFRoot/MVAttribute[@type='RUNDOWN']
                     [Meta[@name='TITLE' and text()='This is a title']]
                     /Meta[@name='PRESENTER']