| For the sake of completeness, a couple of updates[0]: (1) With regard to the "03/10 is ASCII colon" comment: the "03/10" form is apparently known as "column-row notation" (or "column-line notation", see https://en.wikipedia.org/wiki/ISO/IEC_2022#Notation_and_nome...) and refers to the position of the character in an ASCII table such as: https://en.wikipedia.org/wiki/File:USASCII_code_chart.png I actually found a reference (https://dicom.nema.org/medical/dicom/2019d/output/html/part0...) that explains the notation: "the [US ASCII] value can be calculated as (column * 16) + row, e.g., 01/11 corresponds to the value 27 (1BH) [i.e. 0x1B]." It then notes "The column/row notation is used only within Section 6.1 to simplify any cross referencing with applicable ISO standards." :D A (IMO less effective) description can also be found in ECMA-35 (6th edition; section 5.2 "Code Tables"). (2) A nuance with regard to my "the confusion between use of ';' and ':' separators is because the RGB values are not actually parameters" remark: The ECMA-48 (5th Edition; section 5.4.2) specification (& ISO/IEC 8613-6 / ITU-T Rec. T.416) talks about "parameter string" & "parameter sub-string" rather than "sub-parameter". (Also, the "reserved" values mentioned apparently weren't ever actually specified in a standard; and--as noted elsewhere--the format of the ANSI parameter(s) don't exactly match the ODA (ISO/IEC 8613-6 / ITU-T Rec. T.416) format anyway--see ITU-T Rec. T.416 (1993 E) page 41.) (3) The Wikipedia talk page on ANSI escape codes makes...interesting...reading: https://en.wikipedia.org/wiki/Talk:ANSI_escape_code#Clarific... [0] i.e. let me inflict this "knowledge" on you. :D [n] The best explanation for how we ended up in this mess is, I think, found in "Figure 6 - Structure of 8-bit codes" of ECMA-35 (6th Edition). :D |
