Date:Mon, 10 Oct 2005 20:32:27 EDT
Reply-To:UNICODE-MARC Discussion List <[log in to unmask]>
Sender:UNICODE-MARC Discussion List <[log in to unmask]>
From:James Agenbroad <[log in to unmask]>
Subject:Topic 1.5, Should we Exclude Unicode's Unmappable Diacritics?
Comments:To: [log in to unmask]Content-Type:multipart/alternative;
Monday, October 10, 2005
In MARC-8 ANSEL has 28 diacritics. At 0300-036F Unicode has 106 Combining
Diacritical Marks. Thus Unicode has 78 more diacritics than MARC-8. If we decide
to use NCR's I suggest that we exclude these 78 Unicode. Otherwise we would
have to decide whether the NCR for the unmappable diacritic should precede
the letter (probably ASCII) it modifies as with MARC-8 or follow as UTF-8 codes
for diacritics do for which the NCR is a surrogate. I can't imagine that
these 78 unmappable diacritics would often be needed for cataloging but I can
imagine that if allowed they would occasionally get into UTF-8 MARC records and
these records would be requested by MARC-8 systems.
I have called this Topic 1.5 since it depends on our decision about
conversion of unmappable characters--use NCR's or not? and on Unicode characters
to exclude.
Regards,
Jim Agenbroad ( [log in to unmask] (mailto:[log in to unmask])
)
