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ZIM Object Dictionary

Field FieldMask

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The output mask used to present the formatted data value of a field in a list, report or output command.

Valid Values

The applicable masking pattern characters depend on the data type (Type) of the field (e.g., char, varchar, alpha, varalpha, numeric, int, longint, vastint, or date).

For a more detailed explanation of mask patterns and their relation to data types, see Masking.


The FieldMask is used automatically unless an explicit mask has been applied:

  • with the $mask function; or
  • with the MASK format option in Zim Reports.


If FieldMask is $Null, the field will be output without masking unless only an explicitly programmed mask will be used, if provided.

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