MvFUNCTION Example
<MvFUNCTION NAME = "MyFunction" PARAMETERS = "" STANDARDOUTPUTLEVEL = "">
<MvASSIGN NAME = "l.sum" VALUE = "{ 10 + 10 - 5}" >
<MvFUNCTIONRETURN VALUE = "{ l.sum }" />
</MvFUNCTION>
<MvASSIGN NAME = "l.my_sum" VALUE = "{ MyFunction() }" >
<MvEVAL EXPR = "{ 'The Sum is ' $ l.my_sum }" >