It&#x27;s not standard sets, it&#x27;s a bit more than that, Perl 6 has sets of course, but Junctions should be able to autothread and express a sort of superposition of values.<p><a href="http:&#x2F;&#x2F;doc.perl6.org&#x2F;type&#x2F;Junction" rel="nofollow">http:&#x2F;&#x2F;doc.perl6.org&#x2F;type&#x2F;Junction</a><p>I could copy and paste the definition but it wouldn&#x27;t be too helpful without context.