Formal specifications for coded character sets are often couched in a language of escape sequences, ISO-IR numbers, CL and GL areas, C0 and G0 code elements and more. There are 7-bit and 8-bit codes and subtle distinctions between 94-character and 96-character sets. This guide cannot escape from the use of such language but this introduction provides an explanation for the novice.
To gain some knowledge of why things have grown up in this complex fashion, click on historical background. To go straight to discovering the meaning of the language, click on concepts and terminology. For a more detailed table of contents of both parts, read on.
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