Input editing of character strings is the reversal of the application of the edit pattern to remove any literal characters that may have been inserted into the output during output editing. It includes validation of optional and mandatory characters as well. The result of the editing is a single character or character string. In the case of a character string, the extracted characters are concatenated in the appropriate direction to compose the internal string value.
Character string edit patterns are interpreted much the same as for numeric strings, with the exception that there is only one format.
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