The MARC character B0 is used to represent both weak aspiration
(romanized Chinese according to the Wade-Giles system) and the voiced
pharyngeal fricative (romanized Arabic or Hebrew). In the Unicode
standard, U+02BD represents "weak aspiration" and U+02BF represents
"voiced pharyngeal fricative." U+02BB was mapped to B0 because its
dual function (as an alternate for the transliterated representation
of the ain or for indication of weak aspiration) reflects the multiple
uses of the MARC B0 character.
Please note that in Proposal 96-10 ("MARC Character Set Issues and
Mapping to Unicode/UCS," located at:
B0 is mapped to U+02BF. It was changed to U+02BB in the 2000 edition
of the "MARC 21 Specifications for Record Structure, Character Sets,
and Exchange Media" for the reasons stated above.
Network Development and MARC Standards Office
Library of Congress
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>>> Wendy Robertson <[log in to unmask]> 10/25 12:55 PM >>>
Could someone please explain why the
equivalency for MARC B0 was changed from 02BF to 02BB.