Peter Schouten said:

>Each manifestation record will have a media type, carrier type and
>content type, which can be displayed in text or as an image ...

These phrases replace GMDs.  Some 33X phrases are misleading (e.g.,
"computer" for "electronic", already outdated as hand held devices
replace computers for using electronic texts).  Some 33X phrases are
too long for practical display, with obscure meanings (e.g., tactile
three-dimensional form)*.  It is difficult to imagine the number of
icons required to represent the great array of distinctions in these
RDA phrases.  Fixed fields seem to be used to generate both Media Type
phrases and icons in existing catalogues.

Presumably ILS designers would be guided by ISBD's Area 0 in where to
display these 3XX phrases.  In RDA test records in the LC online
catalogue, they are displayed after collation, which is far too late.

There are distinctions missing from both the RDA phrases and fixed
field based phrases.  The RDA phrases don't indicate an integrating
resource.  A Media Type phrase based on LDR/06 = i does not
distinguish between loose-leaf print and a website.  SMDs can help,
but the provider neutral e-book standard calls for "online resource"
which can apply to an electronic text, a website, a computer game, a
database, a streaming video, etc.

Patron convenience as a guiding principle seems to be ever receding.


   __       __   J. McRee (Mac) Elrod ([email protected])
  {__  |   /     Special Libraries Cataloguing   HTTP://www.slc.bc.ca/
  ___} |__ \__________________________________________________________


*Consider the phrases which replace "map". "globe", etc.:

cartographic dataset                         }
cartographic image                           } [SLC exports "cartographic"
cartographic moving image                    } SMD is specific term.]
cartographic tactile image                   }
cartographic tactile three-dimensional form  } 
cartographic three-dimensional form          }

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