ALPHABETS, ALPHANUMERIC CHARACTER SETS, BYTES, CHARACTER SETS, CODED CHARACTERSETS, CODED REPRESENTATION, CODES, CONTROL CHARACTERS, DATA CODES, DATAPROCESSING, DATA TRANSMISSION, GRAPHIC CHARACTERS, INFORMATION EXCHANGE, LATINCHARACTERS
被代替标准
CAN/CSA-Z243.4.1-98
适用范围
1.1
This Standard defines the alphanumeric lexical sequence for the English and
French languages. It is intended for general-purpose sorting of all
alphanumeric strings using the character repertoire of CSA Standard
CAN/CSA-Z243.4 in Canada, wherever human intervention is involved or sorted
results are presented to users. 1.2
Sorting is based on the rules of word ordering rather than on telephone
directory sorting. As telephone directory sorting depends heavily on the
application and would utilize word ordering as a lower common denominator of
sorting, telephone directory sorting could also use the present Standard as a
base. While recommending that different fields be sorted in separate phases
(eg, first names, then second names considered when first names are exactly
equal in a name list), the present Standard reserves character NO-BREAK SPACe
(NBSP) to introduce sequencing breaks in a string for quick sorts in a single
step. 1.3 The sort tables are defined for the complete repertoire of graphic characters
defined in CAN/CSA-Z243.4. Only three of the five graphic sets defined in
CAN/CSA-Z243.4 are necessary to complete the full repertoire of these graphic
characters. These are
(a) Primary Graphic Set;*
(b) General Purpose Supplementary Graphic Set; and
(c) Latin Alphabet No. 1 Supplementary Graphic Set.
*This is the normal primary graphic set, which is the same as US-ASCII (ANSi
X3.4). 1.4
Because different bit combinations are used in some cases in CAN/CSA-Z243.4 to
represent the same graphic characters, the present Standard makes no reference
to these bit combinations, but refers instead in all tables to the character
names of CAN/CSA-Z243.4. This could permit extension of the scope to other
standard character sets or coding schemes adopted by other international
organizations or specific equipment manufacturers. 1.5
This standard alphanumeric lexical sequence is the sequence that computerized,
general-purpose, alphanumeric sort programs should produce in Canada. It is
also the order that indexed files in computers or ordered lists in databases
should follow in Canada when alphanumeric data is involved. All computerized
comparisons where the results are expected to be consistent with this Standard
should be made in accordance with the order prescribed by this Standard (to do
so, the keys whose formation is described in the compliance method of Clause
5.2 are the recommended keys that could be used).