Hello,

I would like to suggest a new syntax for checking if the property expression 
value is a null:

> value="?prop"


will return false if property "prop" is null or true if not

> value="?prop.a.b.c"


will return false if property "c" is null or true if not

> value="?prop?.a?.b?.c"

will return false if one of the properties is null.

> value="prop"


will call toString to convert it to a boolean, is not the best way how to 
implement a null check.

We have isNotNull component, which I would like to eliminate.

Denis






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