FNToBoolean
Related Doc:
package dpath
default behavior is inherited and it displays a RecipeOp assuming there are no children to display.
default behavior is inherited and it displays a RecipeOp assuming there are no children to display. Override and make it call one of the above toXML methods if there are children to display.
Summary: Computes the effective boolean value of the sequence $arg.
If $arg is the empty sequence, fn:boolean returns false.
If $arg is a sequence whose first item is a node, fn:boolean returns true.
If $arg is a singleton value of type xs:boolean or a derived from xs:boolean, fn:boolean returns $arg.
If $arg is a singleton value of type xs:string or a type derived from xs:string, xs:anyURI or a type derived from xs:anyURI or xs:untypedAtomic, fn:boolean returns false if the operand value has zero length; otherwise it returns true.
If $arg is a singleton value of any numeric type or a type derived from a numeric type, fn:boolean returns false if the operand value is NaN or is numerically equal to zero; otherwise it returns true.
In all other cases, fn:boolean raises a type error [err:FORG0006].