at the f2f in basel (sept. 2007) it has been decided to replace the
method event constants (int) by package style string constants.
at the f2f in costa mesa (april 2008) the jcr names have been discussed in
detail and it has been decided to use JCR names wherever names are used
within the specification.
consequently the method event constants need to removed again
from the source and the specification needs to list the method event
jcr-names (see also issue #506 for a discussion about defining constants
for jcr names).