JESS: addSlot without any default value

Hello,
First, excuse me for my English. My native languaje is Spanish.
I am writing to you because I have a little problem with Jess's API, especially with addSlot from Class Deftemplate. I do not know how I add a new slot without any default value. The main problem is with FLOAT and INTEGER types. Because, some Facts which I work do not have this slot instanced. If a give a default value, some rules will be fired . I usually add SYMBOL slots in this way:

addSlot("Name", Funcall.NIL, "SYMBOL");

And then, when I assert a new Fact, a (Name nil) appears if I do not give any value. SYMBOL type is not a problem, but FLOAT and INTEGER types is a problem for me.

I appreciate your time. Thanks in advance.
Best regards

Santiago
 		 	   		  



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