Thanks, Kevin. The XML exports follows the XML format as described here:
This explains the layout for the case repository/suites but it’s very similar for the runs. XML is a very structured format and the exports include everything that is part/was recorded as part of a test run (section, tests/cases, results, etc.) so there’s more in the XML files than just the cases/tests. It resembles the tree-like structure with sections (+sub-sections) and tests and each test includes the results, comments, assignments, etc.
A simpler format would be the CSV export which would export just the tests (or results), with one test/result per line.
I hope this helps!