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gils: Re: GILS to USMARC mapping.

gils: Re: GILS to USMARC mapping.

Re: GILS to USMARC mapping.

Rebecca S. Guenther (rgue@loc.gov)
Wed, 9 Oct 1996 09:48:49 -0400 (EDT) 

Date: Wed, 9 Oct 1996 09:48:49 -0400 (EDT)
From: "Rebecca S. Guenther" <rgue@loc.gov>
To: "Margaret St. Pierre" <saint@bluangel.com>
Subject: Re: GILS to USMARC mapping.
In-Reply-To: <9610081639.AA01132@bluangel.com>
Message-Id: <Pine.A32.3.93.961009090021.46303E-100000@rs8.loc.gov>


On Tue, 8 Oct 1996, Margaret St. Pierre wrote:
> 
> I'm working on the mapping GILS records to USMARC, as described in the
> GILS profile V2.  I have a few questions for the GILS/USMARC experts.
> 
> USMARC mapping requires that you specify the Type of Record which is
> one of: an electronic information recource, a geospatial resource, or
> some other type of resource.  Is there a GILS element that determines
> the Type of Record?  If not, should we define one?  Under what
> conditions should the Type of Record be geospatial?

There is the element that was added called "Medium".  This was mapped to
245$h (Medium, in title field), although some consideration was given to
mapping it to the Leader/06 (Type of record).

The element you are referring to would be roughly equivalent to ObjectType
in the Dublin Core list of elements. There has been a lot of discussion
about what should go there, and there are various levels of "object type".
As to the "Type of Record" in USMARC, perhaps there should be an element
in GILS, since there seems to be nothing now that could generate that,
except making an inference from the "Medium".  However, since I see the
"Medium" element is actually "Availability Medium", this may not always be
the same as the type of record.  We are having discussions in the USMARC
community about how to code Type of record for electronic items; whether
using the code that indicates it is a computer file is useful when the
content is, for example, a digitized picture (some think it should be
coded in Type of record as "graphic" in this case).  

The Dublin Core ObjectType has been mapped to Leader/06, although that
mapping is far from perfect since a mixture of levels of object types 
will likely be used for that element. However, for GILS, there could be
guidelines as to what specific values are used.


> What does it mean when a single GILS element maps to multiple USMARC 
> tags?  Does it mean that the element is replicated once for each
> USMARC tag?

Please give an example of where this occurs. I think the original mapping
may have had some cases where 2 USMARC tags were used, but since the
revision a year or so ago, these had been changed.


Rebecca

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^  Rebecca S. Guenther                                   ^^
^^  Senior MARC Standards Specialist                      ^^
^^  Network Development and MARC Standards Office         ^^
^^  Library of Congress                                   ^^
^^  Washington, DC 20540-4020                             ^^
^^  (202) 707-5092 (voice)    (202) 707-0115 (FAX)        ^^
^^  rgue@loc.gov                                          ^^
^^                                                        ^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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