ISO/IEC 10367


ISO/IEC 10367:1991 is a standard developed by ISO/IEC JTC 1/SC 2, defining graphical character sets for use in character encodings implementing levels 2 and 3 of ISO/IEC 4873.

Relationship to ISO/IEC 8859

The parts of ISO/IEC 8859 define complete encodings at level 1 of ISO/IEC 4873, and do not allow for use of multiple parts together. For use at levels 2 and 3 of ISO/IEC 4873, ISO/IEC 8859 stipulates that equivalent sets from ISO/IEC 10367 should be used instead.
ISO/IEC 10367:1991 includes ASCII, as well as sets matching the G1 sets used for the right-hand sides of ISO/IEC 6937 and of ISO/IEC 8859 parts 1 through 9, a set of additional Roman characters supplementing some of those parts, and a set of box drawing characters.

Supplementary G3 Latin set

ISO/IEC 10367 includes the ISO-IR-154 graphical set, which is intended to supplement Latin alphabets number 1, 2 and 5. Specifically, it is intended for use as a G3 set in a profile of ISO/IEC 4873 in which the G1 and G2 sets include the right hand side of ISO-8859-2, and also that of either ISO-8859-1 or ISO-8859-9. These configurations represent the entire ISO/IEC 6937 repertoire without non-spacing codes.
For instance, the letter Ĉ would be encoded under ISO/IEC 4873 level 2 as 0x8F 0x23 if this set is included.
Highlighted characters also appear in ISO-8859-1 or ISO-8859-9. Under the current edition of ISO/IEC 4873 / ECMA-43, characters must be used from the lowest-numbered working set they appear in, hence those characters are not used from this G3 set when the respective ISO-8859 right-hand side set is used as the G1 or G2 set.

Box drawing set

The following shows the box drawing set from ISO/IEC 10367, which is registered for ISO/IEC 2022 use as ISO-IR-155. It does not use the 0x20/A0 or 0x7F/FF positions, but is nonetheless registered as a 96-character set.
Perl libintl includes a "ISO_10367-BOX" codec. This encodes/decodes ASCII over GL and the ISO-IR-155 box drawing set over GR with a few deviations. Specifically, it includes double-lined box-drawing characters in place of heavy-lined characters, and it replaces the upper half block at 0xCB with a private use character U+E019, documented as "Unit space B".