The file “COMEX/EX02/elemConnectivity.rb” contains the ruby equivalent of the “testElemConnectivity” function in “COMEX/EX04/testNastranDb.py” example. The operations done in this ruby file correspond to the ones in example “RUBY/EX16/elemConnectivity.rb” except that the COM component is used instead of the ruby extension. The comparison of the two ruby files shows that the differences correspond to the access to the component, and to the use of iterators.