Release 10.1A: OpenEdge Development:
Progress 4GL Reference

> ## VALIDATE-EXPRESSION attribute

> The value of the validation expression in the database schema for the database field that corresponds to the buffer-field.

> The VALIDATE-EXPRESSION attribute lets you write user input validation code for interfaces that Progress’s automatic user input validation does not support.

> Data type: CHARACTER

> Access: Readable/Writeable

> Applies to: Buffer-field object handle

> If a buffer-field is associated with a dynamic browse column, you should set the buffer-field’s VALIDATE-EXPRESSION attribute before the dynamic browse column is added to the browser (via ADD-LIKE-COLUMN( )). The validation expression is compiled at this time. If the VALIDATE-EXPRESSION attribute is changed later, it is ignored.

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