Complex Grouping using XSLT 1.0

Question

I\'ve revised the data file and added a Grouping column. I could not figure out a logic for grouping otherwise.

The data contains information for a stamp collection.

Answer 1

Your problem is interesting. Basic order is ItemNo with grouping header on change, but in case of groups in Series or Issue there shall be another grouping header without changing the ItemNo order. I figured out the following and used a html table with background color for the grouping headers for easier overview. I didn't completely understand the expected output, I'm not a stamp expert. The script should give you the idea how to solve that.

... and yes, the html isn't complete