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Administering code tables

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A code table defines a character set (Coded Character Set, CCS for short) and the coding of these characters in the file. A CCS is assigned a name of up to 8 characters in length via which the CCS can be addressed.

As FT administrator, you can use the ftmodo -ccs command to set a standard CCS for openFT. In addition, you are still able to set your own 8-bit CCS.

The standard CCS is used for all FT requests. However, users can set a different CCS in the ft-/ncopy request and in the openFT Editor.

The following CCSs are supplied with openFT as standard:

Name of the CCS

Meaning

ISO88591 to ISO8859B and
ISO8859D to ISO8859G

for the ASCII tables ISO8859-1 to ISO8859-11 and
ISO8859-13 to ISO8859-16

ISO646

for the international 7-bit ASCII table

ISO646DE

for the German 7-bit ASCII reference version

EDF041 to EDF04A, EDF04D
and EDF04F

for the EBCDIC tables DF04-1 to DF04-10, DF04-13 and
DF04-15

EDF03IRV

for the international 7-bit EBCDIC table defined by FSC

EDF03DRV

for the German 7-bit EBCDIC table defined by FSC

UTF16

for Unicode with UTF-16 coding (platform-specific endian)

UTF8

for Unicode with UTF-8 coding

UTFE

for Unicode with the UTF-E coding

UTF16LE

for Unicode with UTF-16 coding (little-endian)

UTF16BE

for Unicode with UTF-16 coding (big-endian)

UTFEIBM

for Unicode with the UTF-EBCDIC coding defined by IBM

IBM037

for the US/Canada EBCDIC character set defined by IBM

IBM273

for the German/Austria EBCDIC character set defined by
IBM

IBM500

for the International EBCDIC character set defined by IBM

IBM1047

for the OpenExtensions EBCDIC character set defined by
IBM

CP437

for the English (USA) OEM character set defined by
Microsoft

CP720

for the Arabic OEM character set character set defined by
Microsoft

CP737

for the Greek OEM character set defined by Microsoft

CP775

for the Lettish OEM character set defined by Microsoft

CP850

for the Western Europe OEM character set defined by
Microsoft

CP852

for the Polish OEM character set defined by Microsoft

CP855

for the Serbian OEM character set defined by Microsoft

CP857

for the Turkish OEM character set defined by Microsoft

CP858

for the OEM character set CP850 with the Euro symbol
defined by Microsoft

CP862

for the Hebrew OEM character set defined by Microsoft

CP866

for the Cyrillic OEM character set defined by Microsoft

CP874

for the Thai Windows character set defined by Microsoft

CP1250

for the Central Europe Windows character set defined by
Microsoft

CP1251

for the Cyrillic Windows character set defined by Microsoft

CP1252

for the Western Europe Windows character set with the
Euro symbol defined by Microsoft

CP1253

for the Greek Windows character set defined by Microsoft

CP1254

for the Turkish Windows character set defined by
Microsoft

CP1255

for the Hebrew Windows character set defined by
Microsoft

CP1256

for the Arabic Windows character set defined by Microsoft

CP1257

for the Baltic Windows character set defined by Microsoft

CP1258

for the Vietnamese Windows character set defined by
Microsoft

Creating a user-defined CCS

If you are an openFT administrator, you can create your own CCS (Coded Character Set). To do this, you must create a text file which is stored in the sysccs subfolder of the openFT instance. The CCS name corresponds to the name of this file.

The text file must have the following structure:

  • The first line starts with a '#'.

    The second character is a blank. The remainder of the line contains a comment which characterizes the code contained.
    In Unix systems, the file name must be written completely in lower case.

  • The second line contains an alphabetic character which can at present only have the value 'S'. 'S' stands for single-byte code, i.e. a character is always 1 byte in length.

  • The third line contains three numbers.

    The first number is a 4-digit hexadecimal number. This defines the substitution character to be used if a Unicode character cannot be mapped to the code.

    The second number is currently always '0'.

    The third number is a decimal number which defines the number of code pages that follow. It currently always has the value '1'.

  • The following lines define the code pages and have the following structure:

    • The first of these lines contains the number of the code page in the form of a twodigit hexadecimal number.

    • All the subsequent lines contain the mapping of the characters for the codes to be defined to UTF-16 in the form of a 4-digit hexadecimal number. The values are arranged in 16 lines, each of which contains 16 4-digit hexadecimal numbers with no spaces.

Example for ISO8859-15 (Western Europe with Euro symbol)

# Encoding file: iso8859-15, single-byte
S
003F 0 1
00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