The old 2.2 RoadMapToMarc

http://wiki.koha.org/doku.php?id=roadmaptomarc

1.
ToDoMARC : the complete ROADMAP, and where we are...
2.
WhatIsMarc : explains what is MARC
3.
MarcDBStructure : almost uptodate. Some indexes have been added, and a field or 2
4.
MarcKohaMap : how we map koha old-db fields to USMARC subfields.

not updtodate, but useful :

1.
MarcOperation : how we will manage the differents MARC normas in koha.

completly out of date :

1.
CataloguingAPI : see Biblio.pm instead (lot of comments at the beginning)
2.
WalktroughToMarc : see ToDoMARC instead