XPath技术问题：如何排除子节点中的指定文本内容

最终XPath表达式 #

TEI//div/u//text()[
  not(parent::desc or parent::vocal)
  and not(preceding-sibling::anchor and following-sibling::anchor)
  and not(ancestor::*[preceding-sibling::anchor and following-sibling::anchor])
]

表达式拆解 #

• TEI//div/u//text()：定位到
  下节点内的所有文本节点（包括嵌套节点里的文本）
• not(parent::desc or parent::vocal)：直接排除、节点自身包含的文本
• not(preceding-sibling::anchor and following-sibling::anchor)：排除直接夹在两个兄弟节点之间的文本
• not(ancestor::*[preceding-sibling::anchor and following-sibling::anchor])：排除那些嵌套在“...”区间内的其他节点（比如示例里的）中的文本

normalize-space(string-join(TEI//div/u//text()[
  not(parent::desc or parent::vocal)
  and not(preceding-sibling::anchor and following-sibling::anchor)
  and not(ancestor::*[preceding-sibling::anchor and following-sibling::anchor])
], ''))