[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: How to escape the normal interpretation of parent
On 5/24/2023 1:21 PM, David Carlisle d.p.carlisle@xxxxxxxxx wrote: > > > On Wed, 24 May 2023 at 12:00, Roger L Costello costello@xxxxxxxxx > <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hi Folks, > > My input consist of lines of text. Here is a sample input: > > 1 Record Type > > The XSLT program is to transform that line into this XML: > > <column>1</column> > <field-name>Record Type</field-name> > > Here is another sample input: > > 2 thru 4 Customer/Area Code > > The XSLT program is to transform that line into this XML: > > <column>2 thru 4</column> > <field-name>Customer/Area Code</field-name> > > I figured that <xsl:analyze-string and regex-group() would be > suitable for breaking apart each line. > > What regex to use for column? The value of column is an integer > followed optionally by "thru" and another integer. I figured this > regex should do the job: > > ([0-9]+(\s+thru\s+[0-9]+)?) > > But, but, but, .... > > regex-group(1) means that whole regex. So with this input: > > 2 thru 4 Customer/Area Code > > regex-group(1) matches: > > 2 thru 4 > > Perfect. > > Unfortunately, regex-group(2) matches the inner, optional part. So > I end up with this: > > <column>2 thru 4</column> > <field-name> thru 4</field-name> > > Eek! > > Wrong. > > How to solve this problem? Is there a way to specify that the > inner, optional part: > > (\s+thru\s+[0-9]+)? > > belongs only to regex-group(1), not to regex-group(2)? > > Stated another way, is there a way to indicate that the > parentheses in the inner, optional part are not to be considered > as regex-group() syntax? > > Stated still another way, is there a way to "escape" the normal > interpretation of parentheses when utilizing regex-group()? > > > B You could use non capturing group but no real need here, you haven't > shown any regex matchingB the second column, something like > > ^\s*([0-9]+(\s+thru\s+[0-9]+)?)\s*(.*)$ > > then your columns are groups 1 and 3 Are they? I think you would need <field-name>{(regex-group(3), regex-group(2))[1]}</field-name> as no regex-group is created if no match occurs.
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