And why should we put the version number in the node ?If it is to substitute the XEP-0092, I think it's the wrong way. (Because it break compatibility with xep-0115 1.3 (if the capabilities doesn't change between versions 1.3.4b to 1.3.4c)
Personally I think the client version information should be carried in the disco#info using XEP-0128 using a new special FORM_TYPE (maybe even reusing using jabber:iq:version and using its elements as the xdata field names).
Richard
