包含函数如何在 xpath 中工作

Question

<collection>
<movie title="Transformers" shelf="B">
   <type>Science Fiction</type>
   <format>DVD</format>
   <year>1980</year>
   <rating>R</rating>
   <popularity>7</popularity>
   <description>Science Fiction</description>
</movie>
   <movie title="Trigun" shelf="B">
   <type>Action</type>
   <format>DVD</format>
   <episodes>4</episodes>
   <rating>PG</rating>
   <popularity>10</popularity>
   <description>Quite a bit of action!</description>
</movie>
<movie title="Ishtar" shelf="A">
   <type>Comedy</type>
   <format>VHS</format>
   <rating>PG</rating>
   <popularity>2</popularity>
   <description>Boring</description>
</movie>
</collection>

在上面的代码段中，我想获取描述元素包含子字符串的段的 title 属性 function.I 尝试使用包含 returns 布尔值并期望一个子字符串的函数参数的字符串。我尝试了一些 Xpaths 但没有成功，我知道答案是 collection/movie[contains(description,'bit')]/@title

由于只包含returns布尔值，上面是如何工作的case.Please澄清一下

Answer 1

具体跟contains()没有关系，[...]只是定义了一个predicate, with which to filter things. So tag[boolean-expression()] will return to you exactly those tags for which boolean-expression() returns true() (or to be more precise: a value that can be converted to true()).

包含函数如何在 xpath 中工作

How does contain function work in xpath

xpath

contains