-Takes the contents of an xlogfile and returns the results of the
-analysis. The arguments are joined together then split by the newline
-character, so they can be specified as a single string, as a list of
-lines, or as a combination thereof.
+The associated value is an arrayref of NetHack versions that should be
+considered. Any game that was played on a version that is not in this
+arrayref will be ignored. If this key is not present or the value is
+an empty arrayref, all versions are considered.
+
+=item exclude_versions
+
+The associated value is an arrayref of NetHack versions that should
+not be considered. Any game that was played on a version that is in
+this arrayref will be ignored. If a version is both included and
+excluded at the same time, it will not be considered (in other words,
+exclude_versions overrides include_versions).
+
+=back