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13.1.9 Character Encodings

A character is sometimes represented merely by its code, and sometimes by another integer value which is composed from the code and all implementation-defined attributes (in an implementation-defined way that might vary between Lisp images even in the same implementation). This integer, returned by the function char-int, is called the character's ``encoding.'' There is no corresponding function from a character's encoding back to the character, since its primary intended uses include things like hashing where an inverse operation is not really called for.

The following X3J13 cleanup issue, not part of the specification, applies to this section:

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