Grouping is a common problem in XSLT stylesheets: how do you take a list of elements and
arrange them into groups. There are two main situations in which you need to do this:
grouping by content (e.g. group all the people from Nottingham together)
grouping by position (e.g. group 10 items per list)
Grouping By Content
The most efficient method for grouping large numbers of elements according to their content,
be it the value of
an attribute, of a subelement, or its textual content, is the Muenchian Method (after
Steve Muench, who
discovered/developed it).
Grouping Using the Muenchian Method
Here are some posts that give more examples of grouping by content:
Grouping
Using the Muenchian MethodGrouping
Using the Muenchian Method #2Grouping Using the Muenchian Method #3Grouping into a TableMultiple Level Grouping
Grouping By Position
Here are a couple of posts that illustrate grouping by position:
Adding
Something Only at the End of a GroupCreating a Calendar
Links
XSLT Recommendation: Miscellaneous Extra FunctionsXSLT Recommendation: Keys