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+==== cardinality() Function ====
+The cardinality() function returns a boolean value depending on whether the cardinality of the collection of nodes is present in the cards string
+If the collection of nodes is empty and the cards argument contains "0" return true.
+If the collection of nodes contains a single node and the cards argument contains "1" return true.
+If the collection of nodes contains more than one node and the cards argument contains "M" return true.
+Otherwise, return false.
+^ Argument      ^ Kind   ^ Required    ^ Purpose          ^
+|**expression**  |nodes  |yes  |an XPath expression that resolves to some number, possibly zero, of nodes   |
+|**cards**  |string  |yes  |a string value containing one or more of "0", "1" and "M"   |
+=== Usage and examples ===
+Place a ...
+Return to [[org.gramar.base:index|index]]

Grammatical Architectures