[xacml] functions issues

I'm ok with the way 'or', 'and' are descirbed 
in the latest document:

 

'or': 
First to last, 'true' if one arg evaluates to 'true'. If any arg raises an 
error, return an ERROR.

'and': First to last, 'false' if one arg evaluates 
to 'false'. If any arg raises an error, return an ERROR.

In any case, if definitive result can be concluded, 
the rest of the args is not evaluated.

 

Here is a variation that forces all args 
computation, even in the presense of an error:

(Longer, but gives your a better chance to 
succeed):

 

Compute all 'and', 'or' args first to last. If 
'error' is raised use it as placeholder until all computation is 
complete.

If 'error' could be substituted with either (true, 
false) without changing an outcome, return outcome.

Otherwise return error.

 

In any case, I do not see any errors being 
'hidden', meaning changing an outcome of computation. 

Simply some errors are relevant and some are 
not.

 

I do not agree with defining error 
functions and default values.

 

Simon