> Contrary, I think that a high risk of misuse is an important 
> argument weighing the value of a feature.
> 
> This way, for example, the last generation of programmig 
> languages do not include pointers or restricts them (even 
> C++x will ban some use of
> pointers) preventing their invalid, unsafe, unsecure use.

That's different. Pointers are an unnecessary feature - there are better
features available that make traditional pointers redundant. Dynamic XPath
evaluation adds capability to the language - capability which users have
been asking for for years, and which can't be done in any other way.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay