How to find a word within text using XSLT 2.0 and REGEX (which doesn't have \b word boundary)?

问题

I am attempting to scan a string of words and look for the presence of a particular word(case insensitive) in an XSLT 2.0 stylesheet using REGEX.

I have a list of words that I wish to iterate over and determine whether or not they exist within a given string.

I want to match on a word anywhere within the given text, but I do not want to match within a word (i.e. A search for foo should not match on "food" and a search for bar should not match on "rebar").

XSLT 2.0 REGEX does not have a word boundary(\b), so I need to replicate it as best I can.

回答1:

You can use alternation to avoid repetition:

<xsl:if test="matches($prose, concat('(^|\W)', $word, '($|\W)'),'i')">

回答2:

If your XSLT 2.0 processor is Saxon 9 then you can use Java regular expression syntax (including \b) with the functions matches, tokenize and replace by starting the flag attribute with an exclamation mark:

<xsl:value-of select="matches('all foo is bar', '\bfoo\b', '!i')"/>

Michael Kay mentioned that option recently on the XSL mailing list.

来源：https://stackoverflow.com/questions/2397574/how-to-find-a-word-within-text-using-xslt-2-0-and-regex-which-doesnt-have-b-w