I need to add additonal properties to the nt:file-nodes. I know I can do this by definining the properties to a mixin node type and then defining this new mixin node type to the node(s) by the Property jcr:mixinTypes. But then I loose the opportunity to expand/change this. According to the JCR-Specs "6.7.5 Special Properties jcr:primaryType and jcr:mixinTypes", the property jcr:mixinTypes cannot be deleted or changed any more; this is, I even cannot add additional nodeTypes to the multi-value array of the jcr:mixinTypes-property.
I think this may really become a big problem in the future - I'm not aware what might arise which also needs additional properties added to the node and would be interested if there are known solutions for this Ulrich
