[Koha] More MARC development

[Tonnesen Steve]

My MARC editor has come a little farther along.  It is now possible to add
new fields and subfields, edit existing subfield values, and delete
subfield entries.


Still to be done:

 - the interface needs some major improvements
 - the code needs to be broken down into modules of some sort. 
 - no way to add a subfield if all of the existing subfields are
   deleted... workaround is probably to delete the tag when the last
   subfield is deleted, so that the tag has to be recreated with an
   initial subfield.
 - Lots of work actually tying this code into Koha somehow.  This includes
   running alongside the existing database layout, as well as tying into
   things like catalogue searching, etc.
 - Setting up standard locations for Koha data that may not be covered by
   MARC (ie withdrawn, lost, itemtype).
 
I've parsed all of the MARC21 field and subfield descriptions so they all
show up in the interface as well.  I gather that this is the part that
will likely change in different versions of MARC though?  It would be
fairly simple to modify the field and subfield definitions based on a
preference setting for the version of MARC (MARC21, UKMARC, NZMARC,
MARSMARC, etc.).

Note that the data on my test site is free to edit and play with.  It's
actually running on my laptop, and is a copy of a library's data.   Wreck
it at your leisure, I can restore it quickly if it gets really bad.  :)

Demo is at:

http://142.28.224.11/cgi-bin/koha/acqui.simple/viewmarc.pl


Steve.