[Koha] Search of a framework file and a catalogue file corresponding to this framework

Hi All ! In Koha I created a framework (using the option "Add framework"). Its "framework code" is <B>. Then, using the option "Cataloging" and <B>, I created a catalogue corresponding to this framework <B>. I would like to look the source codes of files of both framework <B> and this catalogue. Have I a right ? What are names of these files ? Where are they placed ? Thank you in advance, Gennady