A-code command parsing
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Identifying words: all forced to lower case; automatic abbreviations and error correction (see the vocabulary document for details).
Basic command: "verb" or "verb noun".
The AGR1, ARG2 and STATUS variables and their values (including error values).
Description scanning for missing vovabulary words
Multiple commands per line: separators '.' (full stop), or ; (semicolon) or the word then.
Explicit object iteration: separators ',' (comma) or the word and.
Implicit object iteration: the DOALL directive.
The except syntax.
Uses of it.
The again (or repeat) verb. On is own and in a multiple command line.