Hi Kashyap,

> init.s defines append as follows -
> append {doAppend}
> ,((((NIL @X @X)) (((@A . @X) @Y (@A . @Z)) (append @X @Y @Z))) . T)
> 
> I gather that the second line that starts with ',' adds properties to the
> symbol.

Yes, that's correct.

> It is not clear to me what the properties are for. Can you please throw
> some light on this?

These are the Pilog predicates for append/3

☺/ A!ex

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