Numerical interval
From Catglobe Wiki
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 Purpose:  | 
 
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 Property name:  | 
 NUMERICAL_INTERVAL_ALLOWED  | |||
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 Type:  | 
 
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 Used for questionnaire:  | 
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 Used for questions:  | 
 Types:  | 
 Text grid  | ||
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 Used for sub-questions:  | 
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 Used for answer options:  | 
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 Example:  | 
 
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