RE: ISSUE 16: parameters for rules

Hi Jirka, all,

> Personally I tend to be conservative in adding features.
> So unless there is clear demand supported by use-cases 
> I wouldn't do this. If decide to do this we need mechanism 
> similar to AVT in XSLT, see:
> http://www.w3.org/TR/xslt#attribute-value-templates

So far I haven't seen any use case where the variable would be in something else than an XPath expression.

So if nobody else can come up with a use case I agree that we can just limit the parameters requirement to enabling the use of XPath variables.

Cheers,
-ys