Re: [OPEN-ILS-GENERAL] TPAC question: getting "ebooks" as an option in formats

Fri, 03 Aug 2012 10:00:58 -0700 

I just want to throw a quick note out:
Any indexed information in the repeatable entries (006/007) is not going to index all values when there are multiple. Evergreen currently only indexes a single value. 


Grabbing the most common point we see this at: vr_format lives in the  
007, I believe. Thus if you have DVD and Blu-ray 007 entries only one  
of the two will be indexed, and thus the record will only show up for  
one of those vr_formats when searching.


This likely complicates things.

Thomas Berezansky
Merrimack Valley Library Consortium


Quoting Dan Wells <[email protected]>:


Hello all,


This is a pretty complex subject, and anyone interested in diving in  
full on should probably start here:


http://www.loc.gov/marc/ldr06guide.html


In all, there are at least five major factors which all relate to  
describe the "type" of an item.  They are:


Leader/06 - Type of record
Leader/07 - Bibliographic level
Field 008 - Fixed-Length Data Elements

Field 006 (repeatable) - Fixed-Length Data Elements - Additional  
Material Characteristics

Field 007 (repeatable) - Physical Description Fixed Field


Notice that I listed 008 before 006.  This is not an accident, as  
despite their numbering, 006 is subsequent to 008.  It actually  
contains the same data as positions 18-34, which is the material  
specific portion of the 008, and was added later to make up for the  
fact that 008 is not repeatable.



There is an interplay between these fields such that the meaning  
changes depending on the content of the more primary fields.



To get more to the point, my understanding is that setting Leader/06  
to 'm' for cataloging is a last resort for records which cannot be  
"better" described at a different level, which means that ebooks are  
supposed to use 'a' (as yours do), and changing them to 'm' would be  
considered (by some, anyway) to not follow best practices.  As Dan  
Scott points out, there are other places (008/006) where the  
cataloger can indicate the electronic-ness of the thing, so  
Leader/06 is more about the "essence" of the thing.


I think! :)


It would probably be wise to work with the catalogers here and  
create a unified "cheat sheet" which would be representative of an  
official Evergreen understanding of best practices for the most  
common types of items.  Without something we can agree on, the  
developers cannot have a unified target, and we will either end up  
with something excessively complex (by simply exposing these  
innards), something watered-down (by simply hiding these innards),  
or an endless tug-of-war as we write code which reflects local  
practices or (worse) our own understanding.


Dan


On 8/3/2012 at 11:19 AM, "Soulliere, Robert"

<[email protected]> wrote:

Hi Justin,

Exactly right about that. If this method is OK, we will be investigating
extending the usefulness of format by extracting and differentiating some of
those "computer file" formats into unique format codes. I am worried about
how far we can get into "creative cataloguing" before we are  considered
rogue librarians or mangle our system. ;-)

Technically, Evergreen gives us the power, but should we use it?

Regards,
Robert


Robert Soulliere, BA (Hons), MLIS
Systems Librarian
Mohawk College Library
[email protected]
Telephone: 905 575 1212 x3936
Fax: 905 575 2011
________________________________________
From: [email protected]
[[email protected]] On Behalf Of Justin
Hopkins [[email protected]]
Sent: August 3, 2012 11:05 AM
To: Evergreen Discussion Group
Subject: Re: [OPEN-ILS-GENERAL] TPAC question: getting "ebooks" as an option
 in formats

Just chiming in to say that I'm also interested in this topic. The LOC marc
standard would seem to indicate that 'm' for computer file (I believe the
label in EG is "electronic resource") is the right code, but that doesn't
seem specific enough to be useful.


On Aug 3, 2012, at 9:17 AM, Soulliere, Robert wrote:


Hi all,


We are investigating a method to get "ebooks" as a format option  
in our TPAC

and I wonder if I could get some feedback on whether this is a good  
way to do

this. Here is the method we are investigating:


1. Add a unique "type" entry using the MARC Code Value Map in the staff

client.


2. Edit the Leader field of our electronic books to indicate that they are

in the new "ebook" type. Currently most use "a" to indicate a book.


I had a few question about this method:

1. Is there a better way to add the ebook as a format search option?

2. Are there potential dangers for us using this method? e.g. issues with

future upgrades.


3. Is this kosher from a cataloguing perspective?

This works technically, but want to see if this is the best way.

Thanks,
Robert









Robert Soulliere, BA (Hons), MLIS
Systems Librarian
Mohawk College Library
[email protected]
Telephone: 905 575 1212 x3936
Fax: 905 575 2011

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