[OPEN-ILS-DEV] Cat: Maintain 001/003/035 according to theMARC21 specification

[Whalen, Liam]

> -----Original Message-----
> From: open-ils-dev-bounces at list.georgialibraries.org 
> [mailto:open-ils-dev-bounces at list.georgialibraries.org] On 
> Behalf Of Dan Scott
> Sent: December 2, 2011 13:47
> To: Evergreen Development Discussion List
> Subject: Re: [OPEN-ILS-DEV] Cat: Maintain 001/003/035 
> according to theMARC21 specification
> 
> On Fri, Dec 2, 2011 at 1:12 PM, Whalen, Liam 
> <Liam.Whalen at nrcan-rncan.gc.ca> wrote:
> > I am making some modifications to 035 tags in our records, 
> and if I do 
> > not have the Global Flag (Cat: Maintain 001/003/035 according to the
> > MARC21 specification) turned off, Evergreen will add a second 035 
> > entry to my record when I do my SQL update to change the 035 tags.  
> > This is not an issue, we can turn off the flag while these 
> updates are 
> > proceeding.
> >
> > However, if we turn the flag back on after the updates are complete 
> > will Evergreen try to modify these records again when they are 
> > interacted with at a later date?
> >
> > Currently this is what an 035 looks like in our records.
> >
> > 035 $a (NRCAN-RNCAN)########
> >
> > (where ####### is our bib id).
> >
> > I am updating it to look like this:
> >
> > 035 $a (CaOOM)#######.
> >
> > I'm changing NRCAN-RNCAN to our various ILL codes.  However 
> when I do 
> > the SQL update with the previously mentioned Global Flag enabled, I 
> > get a second 035 entry that looks like this:
> >
> > 035 $a ()########.

I am no longer getting the empty Organizational MARC code.  I'm not sure why that was happening.  I guess the few records I tested it on must have been missing an 003 before I did my updates.


> >
> > I have disabled the flag, proceeded with updating a single record, 
> > then enabled the flag and edited the record manually (I 
> have manually 
> > edited the record two times-- once in an unrelated field 
> and once in 
> > the 035
> > field) to see if the 035 $a () ####### entry would be added after 
> > manually editing the MARC.  The empty 035 was not added, 
> but I do not 
> > understand how the 'Cat: Maintain 001/003/035 according to 
> the MARC21 
> > specification' Global Flag operates, so I'm wondering if anyone can 
> > see any dangers in turning off the flag, doing the update, then 
> > turning the flag back on again?

I looks to me like Maintain Control numbers 'backups' old 001 and 003 data, via the 035 field, in the case either or both of 001 and 003 are changed by an SQL UPDATE command.  Is that correct?  Being relatively new to MARC I'm not sure I understand the use of the 035 field.  Is 035 meant to provide a way to access a record via another organization's catalogues? 

Liam