Re: [relax-ng] Draft requirements for identity constraints

Here are some papers about integrity constraints for XML.

http://citeseer.nj.nec.com/buneman00reasoning.html
http://citeseer.nj.nec.com/478942.html
http://citeseer.nj.nec.com/475629.html
http://citeseer.nj.nec.com/fan01xml.html
http://citeseer.nj.nec.com/308563.html
http://citeseer.nj.nec.com/432589.html

To ensure that a path points to one data type, my paper 
might help.

http://citeseer.nj.nec.com/murata01extended.html

I am not aware of any proposals which allow keys to contain ruby or BIDI.

-- 
MURATA Makoto (FAMILY Given) <>