How should I refer to a code list value in an expression?

Dear user,
If accessibility is a Boolean attribute you can use just:

• accessibility (that is equivalent to accessibility = true() )
• not(accessibility) (equivalent to accessibility = false() )

accessibilty = '1' or accessibility = '0' can be used only if accessibility is a Code attribute.

Thanks,
Open Foris Team

Hi I know this discussion thread is slightly dated, but I would like to add some points from my own experience for other users who are looking for information regarding using expressions in the

Survey Designer >>> Schema >>> Attribute >>> Relevant >>> Only when expression is verified

If 'accessibility' is a Boolean attribute, you can use

• accessibility = '1'

meaning that this survey attribute only appears when 'accessibility' was assessed as '1' i.e. not accessible, or you can write the following expression

• accessibility = '0'

meaning that this next attribute only appears when 'accessibility' was assessed as '0' i.e. accessible.

If 'accessibility' is instead a Code attribute with multiple code elements as listed in Survey Designer >>> Code Lists, you may use similar expressions as before to configure your survey such that the next attribute only appears when a certain code list element (numerical) is selected,

• accessibility = '5'

meaning that the next attribute only appears when 'accessibility' was assessed as '5'.

Also, to include multiple conditions for the expression, you can use simple conditional expressions

• (accessibility = '2') or (accessibility = '3')

meaning that this next attribute only appears when 'accessibility' was assessed as either '2' or '3'

If you have another code attribute (e.g. 'agriculture_type'), then you can write the following expression

• (accessibility = '2') and (agriculture_type = '3')

meaning that this next attribute only appears when 'accessibility' and 'agriculture_type' was assessed as '2' and '3' respectively.

A less common example, is if you want a question to pop up when any list element was selected in the previous question. In this case, you would write the following expression

• agriculture_type

meaning that if you select any code list element under 'agriculture_type', this next survey question will appear.

Finally, you can write the following expression to exclude certain scenarios

• agriculture_type != '3'

meaning that the next survey question will pop up as long as you select any other code element other than '3' for 'agricultural_type'. To clarify != is the notation used for 'not equals to'

Hope you will find this helpful.