It is not significantly different. Is all I need. I think MinimalXML is not practical thing. Something tells me that pushing Minimal XML 'up' to the subset I've described is better than pushing Common XML 'down' to the subset I've described.
Mixed content is in.
Attribures are in. Attribute value can not contain single quote. Elements are in. I need it, actually. In fact this is not as crazy as it may look.