USoft Rule Language and Domain Constraints

The following two field prompts in the Domain Constraints definition window of USoft Definer refer to USoft Rule Language. The Old Prompts refer to the prompts that were used for these fields in previous versions of USoft. Other than the prompt name change, domain constraint definition is not otherwise affected when compared with older versions of USoft.

New Prompt	Old Prompt
Do Not Allow That	Condition
Make Sure That (in these cases)	Correction

The following examples illustrate how the fields of the Domain Constraints window may be completed for various simple scenarios. They also give an idea of how the naming of the field prompts refer to USoft Rule Language syntax.

Example 1 Restrictive domain constraint

Field	Value
Domain Name:	EMAIL
Do Not Allow That:	instr( domain,'@',1,2 ) != 0
Message	E-mail address may not contain more than 1 @ sign.
Make Sure That (in these cases):	(null)

Example 2 - Corrective domain constraint, no condition

Field	Value
Domain Name:	EU_DATE
Do Not Allow That:	(null)
Message	(null)
Make Sure That (in these cases):	timestamp_to_date( domain )

Example 3 Corrective domain constraint, specified condition

Field	Value
Domain Name:	EMAIL
Do Not Allow That:	instr(domain,'@') = 0
Message	E-mail address must contain the @ sign.
Make Sure That (in these cases):	domain \|\| '@usoft.com'