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Re: [xsl] Creating new, distinct groups of ranges from an aggregation of individual ranges

Subject: Re: [xsl] Creating new, distinct groups of ranges from an aggregation of individual ranges
From: "Heiko Niemann kontakt@xxxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 18 Nov 2014 18:03:20 -0000

Hi again,

I just noticed two shortcomings in the solution I posted:

1) the attribute 'data-type' in the xsl:sort element needs to be set to

2) some cases are not covered

e.g. if the input is


the output holds:


so there is a gap (191-199). The output rather should be:

  <range>191-199</range> <!-- gap -->

Michael could you verify that this would be the expected output.

So I guess it's more tricky.

Michael, could you please provide samples of possible inputs and expected


> Greetings,
> I'm trying to use XSLT 2.0 to create a new set of grouped ranges based on
> the overlap of an aggregation of a set of non-contiguous individual
> ranges. Example:
> Given a range of numbers as an individual set:1. <range>150-202</range>2.
> <range>201-225</range>3. <range>201-204</range>4. <range>205-234</range>5.
> <range>226-234, 250-260</range>
> I'm trying to produce a new grouping based on the way the groups
> overlap:150-200 (this is where <range> 1 starts and overlaps to 2 &
> 3)201-202 (this is where 1 & 2 overlap, and group 1 ends)203-204 (this is
> where 2 & 3 overlap and 3 ends)205-225 (this is where 4 starts and begins
> to overlap with 5)226-234 (this is where 4 & 5 overlap and end for the
> first part of 5)250-260 (this is where the second range in 5 exists)
> The start and end point of the individual source ranges form the
> boundaries.
> I expect to end up with a string or variable structure
> like:<finalrange><range>150-200</range><range>201-202</range>etc</finalrange>or:
> <range start="150" end="200"/><range start="201" end="202"/>etc
> Ultimately I have to format some content in XSLFO based on the XML's
> participation in the "new" given range grouping. If you know aircraft
> effectivity, this is what I am trying to group.
> I've been using <xsl:sequence> to find all the numbers of a single range,
> so I can do compares against individual numbers in the entire range, if
> necessary. But, it seems like it may be easier to just work with the
> boundaries: the start and end points and see if a value falls within it,
> somehow, rather than iterating repetitively through enumerations of
> sequences.
> I've been searching the archives for a while and have found some evocative
> possibilities from Dimitre Novatchev and Michael Kay, but I can't quite
> find a way to work with the overlapping. I'm continuing to study their
> ranging/grouping examples, but help would be appreciated!
> Thanks,Michael Friedman

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