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RE: [xsl] invalid escape sequence: \b
Subject: RE: [xsl] invalid escape sequence: \b From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Mon, 29 Sep 2008 21:25:43 +0100 |
The \b escape sequence is not available in the regex dialect defined for use in the XML Schema and XPath/XSLT specifications. I think the reason for this is that the concept of a "word boundary" is too difficult to define in a language-independent way. Michael Kay http://www.saxonica.com/ > -----Original Message----- > From: Tony Zanella [mailto:tony.zanella@xxxxxxxxx] > Sent: 29 September 2008 20:49 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: [xsl] invalid escape sequence: \b > > Hello all, > I'm using oXygen 9.3 to write a template that uses a regular > expression as an argument for the xslt function matches(). > While writing the regex, I used oXygen's onboard find/replace > with the option for regular expression selected to test for > what I wanted. I managed to get the following regex working > on some test data: > > [IVXMDC]\b > > For example, given the following three lines: > > VI > Pt. XXIV > Chapter II. CHARITABLE EFFORT > II: England > > The regex matches on all and only the roman numerals when I > just use oXygen's find/replace. > > But when I try to plug this into an xsl instruction: > > <xsl:if test="not(matches(.,'[IVXMDC]\b'))"> > <xsl:value-of select="lower-case(.)"/> > </xsl:if> > > I get the following error: > > Description: Error at character 10 in regular expression > "[IVXMDC]+\b": invalid escape sequence > > ...and running the template breaks things. Searching the > forums, I found this thread: > > http://www.biglist.com/lists/lists.mulberrytech.com/xsl-list/a > rchives/200801/msg00304.html > > from which I gathered that I might try to remove the > backslash and see if the transformation worked. But doing > that didn't work. Nor did escaping the backslash with another > backslash. > > Thanks in advance for any tips. And sorry if this isn't the > right forum for this post. > Tony
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