ENABLE Reference Manual
 ENABLE ATTRIBUTES
 UPDATE
 UPDATE Attribute
 The UPDATE attribute indicates whether the application can, or
 cannot, update records in the data base file represented by the
 box. The syntax of the UPDATE attribute is:
 -----------------------------------------------------------------
 | |
 | UPDATE { ON } |
 | { OFF } |
 | |
 | ON |
 | |
 | indicates that the application can update records in the |
 | data base file. |
 | |
 | OFF |
 | |
 | indicates that the application cannot update records in |
 | the data base file. |
 | |
 | The starting value of the UPDATE attribute is ON. |
 | |
 -----------------------------------------------------------------
 Consideration
 If you supply ON as a value for the UPDATE attribute, the value
 of the READ attribute must also be ON. ENABLE imposes this
 requirement because an application must read a record before
 updating it.
 Example
 The following command sets the UPDATE box attribute to OFF:
 SET BOX UPDATE OFF
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