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xmlxpathnamespacesxml-namespacesprefix

xpath expression from xml with namespace prefix

I could not get the following xpath expression to work when the xml path namespace prefix set.

/bk:BookStore/bk:Books/bk:Book[text()='Time Machine']

XML is:

<BookStore xmlns:bk="http://www.bookstore.com/book#">
  <bk:Books>
    <bk:Book id="1">Time Machine></bk:Book>
  </bk:Books>
</bk:BookStore>
Solution

  • Without more information about the host language (in which you attempt to evaluate XPath expressions) it is not possible to provide an useful recommendation.

    Generally, one needs to "register" a namespace with a namespace manager and this also associates a prefix to the registered namespace. Then, using this NamespaceManager object as an argument to the XPath-evaluation method, one can specify as argument to this method an XPath expression that contains names prefixed by that particular prefix.

    Workarounds:

    /*/*[name()='bk:Books']/*[name()='bk:Book' and text()='Time Machine']