A RESTful browser for eXist Java-Based Function Modules

http://www.w3.org/2005/xpath-functions
A module with the XQuery/XPath Core Library Functions
sum
sum($arg as xdt:anyAtomicType*) xdt:anyAtomicType
Returns a value obtained by adding together the values in $arg. If $arg is the the empty sequence the xs:double value 0.0e0 is returned.
$argThe sequence of numbers to be summed up
Returns the sum of all numbers in $arg
sum
sum($arg as xdt:anyAtomicType*, $default as xdt:anyAtomicType?) xdt:anyAtomicType
Returns a value obtained by adding together the values in $arg. If $arg is the the empty sequence then $default is returned.
$argThe sequence of numbers to be summed up
$defaultThe default value if $arg computes to the empty sequence
Returns the sum of all numbers in $arg
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