Qt 5 to-do's in QDom

/*
  ### old todo comments -- I don't know if they still apply...

  If the document dies, remove all pointers to it from children
  which can not be deleted at this time.

  If a node dies and has direct children which can not be deleted,
  then remove the pointer to the parent.

  createElement and friends create double reference counts.
*/

/* ##### new TODOs:

  Remove emtpy emthods in the *Private classes

  Make a lot of the (mostly empty) methods in the public classes inline.
  Specially constructors assignment operators and comparison operators are candidates.
*/
...
       /** ### Qt 5:
         *
         * If we still have QDom, optimize this so that we only declare namespaces that are not
         * yet declared. We loose default namespace mappings, so maybe we should rather store
         * the information that we get from startPrefixMapping()/endPrefixMapping() and use them.
         * Modifications becomes more complex then, however.
         *
         * We cannot do this during the Qt 4 series because it would require too invasive changes, and
         * hence possibly behavioral changes.
         */