XFA Specification
Chapter 24, Picture Clause Specification
Asian Date, Time and Number Considerations
912
Universal
Latin
digits
9
10
100
1000
Full-width
digits
(U+FF19)
Examples of Asian Ideographic Digits
Kanji
(U+4E5D)
Hangul
(U+AD6C)
Hanja
(U+4E5D)
Using Full-Width Characters in Number Data
In Asian prevailing locales, number picture clauses can specify the appearance of data as standard ASCII
characters or full-width characters.
Tens Rule Numeric System
Asian numbers may be assembled using either Arabic number format or Tens Rule.
●
Arabic numeral system.
In this system, numbers are, representing increasing orders of magnitude for
every digit to the left of the (imaginary) decimal point. In this convention, the ideographic characters
are simply concatenated together. For example, using Kanji digits, 10 (
) is character 1 (
)
and 0 (
) together, 11 (
) is two occurrences of the character 1 (
), while 32 (
) is
character 3 (
) and 2 (
) together.
Tens rule.
When using the tens rule to symbolically display a numeric value, the number of tens's (
)
and singletons are combined together. Thus, again using Kanji digits, 20 (
) is 2 (
) tens
(
), and 32 (
) is 3 tens (
) plus 2 (
). As with all rules, there's an exception: 10
is represented using one ideograph (
) and not (
).
●
The tens rule naturally extends to values in the hundreds ( ) and in the thousands ( ). Only Korean
years have values in the thousands. Future Taiwanese eras may have year values in the hundreds. Most
other CKJ numeric values are in the tens.
Imperial (Alternate) Eras and Alternate Era Styles
This section describes the representation of imperial eras in Asian locales.
Asian locales identify the start and end of a year according to the Gregorian calendar; however, such
locales may use multiple eras, where an
era
is a convention for assigning an origin to the number of years:
●
Gregorian calendar era. The origin of a year is relative to the birth and death of Christ. This convention
uses the era names BC and AD. In date picture clauses, the Gregorian calendar era is the
primary or
default era.
0001
001
01
9
(U+5341)
(U+C2ED)
(U+5341)
(U+767E)
(U+BC31)
(U+767E)
(U+5343)
(U+CC9C)
(U+5343)