|-
| valign='top' | '''Rules'''
| The function <code>map:collation</code> returns the collation URI of the <emphem>map</emphem> supplied as <code>$input</code>.
|}
==map:contains==
|-
| valign='top' | '''Rules'''
| The function <code>map:keys</code> takes any <emphem>map</emphem> as its <code>$input</code> argument and returns the keys that are present in the map as a sequence of atomic values, in implementation-dependent order.
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| valign='top' | '''Examples'''