Responses for barcode questions are recorded as a string data type.
 
The following functions can be used in conditions for barcode questions:

• Length: Checks the number of characters
• StartsWith: Checks that the barcode starts with specific characters
• EndsWith: Checks that the barcode ends with specific characters
• IsNumber: Checks that the barcode is a number
• ConsistsOf: Checks that the barcode consists of a specific set characters

Length

Description

Checks the number of characters.
 

Syntax

varBarcode.Length

 This function checks the number of characters recorded.
 

Example 1

Assume that a survey is collecting the barcode of fertilizers farmers use (fertilizer_product). In this particular context you know that the barcode for these items must be 9 characters long. Therefore, the validation condition for this check would be:

fertilizer_product.Length==9

StartsWith

Description 

Checks that the barcode starts with specific characters.
 

Syntax

varBarcode.StartsWith(“value”)

This function checks the barcode recorded starts with the values specified as value.
 

Example 1

Suppose that an agricultural survey is also collecting soil samples from household gardens during the interview. The sample is marked with a barcode that must be scanned into questionnaire. All barcodes provided must start with the numbers “842”.
 
Therefore, the validation condition for this check would be:

soilLabel.StartsWith(“842”)

EndsWith

Description

Checks that the barcode ends with specific characters.
 

Syntax

varBarcode.EndsWith(“value”)

 
This function checks the barcode recorded ends with the characters specified as value.
 

Example 1

Suppose that an agricultural survey is also collecting soil samples from household gardens during the interview. The sample is marked with a barcode that must be scanned into questionnaire. All barcodes provided must end with the numbers “989”.
 
Therefore, the validation condition for this check would be:

soilLabel.EndsWith(“989”)

IsNumber 

Description

Checks that the barcode is a number .
 

Syntax

varBarcode.IsNumber()

This function checks that the barcode recorded is a number.
 

Example 1

Assume that a survey is collecting the barcode of fertilizers farmers use (fertilizer_product). In this particular context you know that the barcode for these must be a number. Therefore, the validation condition for this check would be:

fertilizer_product.IsNumber()

ConsistsOf

Description

Checks that the barcode is consists of a specific set of characters.
 

Syntax

varBarcode.ConsistsOf(“value”)

 
This function checks that the barcode recorded consists of a specific set of characters defined as value.
 

Example 1

 
Assume that a survey is collecting the barcode of fertilizers farmers use (fertilizer_product). In this particular context you know that the barcode for these must be a number. Therefore, the validation condition for this check would be:

fertilizer_product.ConsistsOf("1234567890")