Subject: Re: [xsl] Breaking paragraphs one linebreaks From: "Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 9 May 2019 19:55:34 -0000 |
@Martin, your example works really well. I had to edit the expression, as in my real files sometimes they have used lists instead of linebreaks:
<xsl:param name="lb" as="xs:string"></?(li|ul|br)\s*/?></xsl:param>
However, I can see what I would also need to split at the end of sentences when there's no escaped tag but just final punctuation. To avoid the transformation eating the punctuation, I have tried with a lookbehind assertion but it seems it's not supported:
<xsl:param name="lb" as="xs:string">(?<=[.!?])\s|</?(li|ul|br)\s*/?></xsl:param>
Any ideas?
In general, if there is markup, it might be better to try to parse it, in your initial sample you seemed to have simple HTML empty element syntax with <br> elements, now with the adapted regular expression it seems you expect opening and closing tags.
If you know the escaped markup is an XML fragment then I would try to parse it with the "parse-xml-fragment" function, if it is HTML, then I would look into using David Carlisle's HTML parser implementation done in pure XSLT 2 or use an extension function like the commercial editions of Saxon offer.
As for lookbehind assertions in regular expressions, I don't think the XPath/XSLT/XQuery regular expression syntax supports that. I think Saxon allows a flag on regular expression constructs to drop down to platform specific regular expression implementations, that might work if the Java platform or the .NET platform supports lookbehinds.
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