[英]XPath: select all A nodes and all B nodes that are not inside an A node
一个XPath表达式中是否可能有以下内容(请参见下面的示例):
选择全部(味精类的跨度标签)和全部((具有非空alt属性的img标签)和(不位于味精类的跨度标签内)
简化样本:
<span class="msg">Message text A</span>
<img alt="" />
<span class="msg">Message text B <img alt="text A" /></span>
<span class="err">Error text C <img alt="text B" /></span>
<img alt="text C" />
<span class="err">Error text D</span>
结果节点集应包含:
<span class="msg">Message text A</span>
<span class="msg">Message text B <img alt="text A" /></span>
<img alt="text B" />
<img alt="text C" />
未经测试,但类似?
//span[@class='msg'] | //img[@alt!='' and not(ancestor::span[@class='msg'])]
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