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Repeat groups can have multiple questions with the same path (ex. /data/child_repeat/name). For this reason, special functions are required when writing logic within a repeat group. 

The Parent Function: (..)

 Using the parent function (..) allows access the parent of the current question. For example, if writing logic for the question "What is Your Name?", typing (..) will access the /data/child_repeat in logic which can then be used to access another question within the same repeat.    

Use Case: Writing logic between questions in the repeat.
Example: ../child_dob_known = 'yes' will prompt the user to enter a child's birth date only if it's known.

Use Case: Display the value of another question in the label.  
Example: <output value="../name" can display the data within the <outputvalue="/data/child_repeat/name" /> string
Note: If there are groups within a repeat, (..) may need to be repeated multiple times (I.e., ../../age).

The Position Function: position( )

In a hidden value, the position function (position ()) placed in a calculate condition will return the position of a question in a repeat group (i.e., first, second).  The position function is zero-indexed meaning that numbering starts with zero (0) and continues.


Limitation: Using the position function may cause inconsistent behavior with nested elements and conditional usage. This issue can be avoided by using the position function in the default value of a question instead of in the calculate condition

The Current Function: current( )

The current function (current( )) will return a relative value to questions inside a repeat group which can be used for any predicate filter that makes use of square brackets [ ].


Paths can point to multiple questions so special functions must be used to access specific repeated values.  

Access a Question by Count:

Accesses a specific question (ex. Question 2 in a group) using square brackets.

Example: /data/child_repeat[1]/name will access the name of the first repeated child.  
Note: This function can only be applied to text-based references and does not apply to Easy References.

Find the Number of Times a Question is Repeated: (count(question_path)

Returns the number of times a question is repeated.  

Example: count(/data/child_repeat) will return the number of times a repeat group was repeated.

 Filtering by Question Answer

 Accesses a specific question based on an answer provided in a repeat group by using a filter in square brackets.