Dynamic repeat labels - Collect v Enketo v Web forms

[ahblake]

I think this is going to end up a multiple post issue as I try to work through labels / repeats / indexed-repeat values and rolling up summaries...

1. What is the issue? Please be detailed.
When a form results in a repeat with many findings, it is very helpful for the enumerator to see some more information in the Collect table of contents screen to be able to quickly find the one they need to return to. Seeing this is less helpful

• Finding repeat > 1
• Finding repeat > 2
• Finding repeat > 3
• Finding repeat > 4
• Finding repeat > 5

Compared to something like this, or whatever combination of values is needed to quickly ID the finding (name / age / medication...)

• Finding [corrosion] [severe] > 1
• Finding [vibration] [moderate] > 2
• Finding [corrosion] [light] > 3
• Finding [coating] [minor] > 4
• Finding [coating] [severe] > 5

So, initially, (naïvely!) I thought, no problem, just whack ${field-name} in the repeat label, job done.

Now, this works in Collect, but perhaps it shouldn't, as it doesn't work in Enketo and also doesn't work in Web Forms. However you can use ${field-name} in a label of a note/question inside a repeat in all three without having to refer to position within the repeat at all, so what makes the label of a repeat special compared to labels inside a repeat?

Then I thought, ok, we can use instance expressions in labels, so I'll just try an indexed-repeat expression, but this both doesn't work, and gets really wonky in Enketo/WF as it started to show values from different choice lists in the broken expression somehow in another form.

I know the indexed-repeat logic is correct as I included a calculate inside the repeat with it and a note to display the result.

After that I tried to go back to an instance expression and then instance but include some position values, first with an indexed repeat and then with a selected-at (after joining the values outside the repeat to select on), all of these failed in different ways.

I'm currently out of ideas on how to further leverage xpath expressions for this (ping @LN!) , and am not sure if I've missed the solution, or if I should be able to use the field name directly and it's just that Enketo & WF aren't properly displaying the value (well Enketo can't as it only ever shows the repeat label once, but WF does repeat the label and doesn't even display it at all in the label, but does in the add repeat button ping @JenniferQ!)

While I could leave my form with only the direct field in the repeat label and be happy it works in Collect I'm concerned that a) this may not work forever, b) I could cause issues when editing / completing via web c) Web Forms cannot display a field in the repeat label at all currently and then suppresses text after the field

2. What steps can we take to reproduce this issue?
Try the attached basic form in Collect vs Enketo & WF

3. What have you tried to fix the issue?

• use the field code directly - Only ok for Collect. Enketo shows first value, but label not repeated. WF repeat label goes blank at expression and suppresses text after expression. 'add repeat dialogue' does evaluate expression and doesn't suppress, but only ever shows value for first repeat element
• use indexed-repeat directly - in a label it doesn't work properly anywhere but as a calculate then displayed with a field it does
• use an instance lookup directly - Only ok for Collect.
• use an instance lookup with indexed repeat as the filter - doesn't work properly anywhere
• use an instance lookup with selected-at as the filter (and a separate join outside the repeat) - doesn't work properly anywhere
• Asked kapa.ai varying versions of how to get a value for a certain element of a repeat

4. Upload any forms or screenshots you can share publicly below.
(to make it easier to keep adding new test cases for this form I created most of the field names and expressions as XL formulae, but this doesn't affect the outcome)

dynamic repeat labels.xlsx (586.8 KB)

[JenniferQ]

Hi @ahblake, nice to read you in the forum!

So, initially, (naïvely!) I thought, no problem, just whack ${field-name} in the repeat label, job done.

Almost! Answering from Web Forms POV:

The begin-repeat in XLSForms acts like a wrapper for all repeat instances, so it can’t directly pull data from individual instances dynamically. It’s better suited for referencing fields outside the repeat, like a global field defined earlier in the form.

To get a dynamic label that shows data from within each repeat instance (e.g., a user-entered name), you need to define the label inside the repeat itself. A clean way to do this is by adding a begin-group within the begin-repeat, like in the example below:

type	name	label
begin-repeat	repeat-wrap-1
begin-group	group-1	Instance ${name}
text	name	Enter a name
end-repeat
end-group

The begin-group inside the begin-repeat creates a scope where ${name} resolves to the name field in the current repeat instance. So, if the user enters “Anna” in one instance, the group label shows “Instance Anna”.

The begin-repeat label itself is left blank because it’s not meant to be dynamic per instance. If you wanted a dynamic label for the entire repeat group, you could reference a field outside the repeat.

In the example you provided before, it would be like this:

dynamic repeat labels - FIXED.xlsx (283.5 KB)

This is how it works:

However, this is not supported for translated labels yet, we have a ticket for that here: Allow output in translation text #22

[ahblake]

@JenniferQ

To get a dynamic label that shows data from within each repeat instance (e.g., a user-entered name), you need to define the label inside the repeat itself. A clean way to do this is by adding a begin-group within the begin-repeat,

This is interesting and thanks for the explanation - I actually have a group in my repeat to allow field-list appearance, but stripped it out to show the issue more simply. Up to now I had focussed on inserting my value into the repeat label as I assumed ( ) that's what the user sees in the Collect ToC view - I didn't yet try leaving the repeat blank or static / also or only labelling the group and seeing if the group appeared in the ToC

So - new tests! With some interesting outcomes, hope this is useful for others and training kava

Using versions:
3bb4a6d16bd587530965479ca63b140bb473bd77 (v2025.2.1)
c026a7ad6411c0fdabac86ffb2cb3c3d89ee11d2 client (v2025.2.1)
7ea7964302e981572fb346760db0ed9d522bb4bb server (v2025.2.1)
Collect 2025.3.0 Beta 2

better-dynamic repeat labels.xlsx (596.5 KB)

• In general -

  • only need to use the field code in the group label, no xpath magick required

  • Web Forms cannot

    • collapse an entire repeat, only collapse per element, vs Enketo which can collapse every element at once if the repeat label isn't blank.
    • show a field in a repeat label, it will only show in the 'add' dialogue. the repeat header doesn't show the field or any text after it.
      • 
      • 
      • 

  • To get the behaviour I want the approach seems to be:

    • Put a static (or only refer to a value outside the repeat) label on the repeat, ideally so the toast in Collect gives a sensible message to the user to trigger adding a repeat element eg Add "another finding about [parent asset id]"?
      • Example F in the attached shows a field outside the repeat used in the repeat label, behaviour is as for B.
    • Put a direct field code(s) in the group label, referring to a field(s) inside that repeat
    • If possible, do not put user facing content outside the group in the repeat as this adds an extra layer of navigation when drilling in. But it's ok to put non user facing content outside it (calculate) to simplify any xpath references

  • FYI Not every time, but most times when drilling up in Collect ToC view starting from inside the group, when shown the list of [repeat#]. [group label], it takes two taps to get to the next level up, and occasionally, three. If you jump repeatedly between the list of elements and the group content, occasionally it also takes two taps to get back to the list of groups. The taps are registered as the icon flashes with no nav change. Jumping between repeat and group without entering a group usually only requires one tap to drill back up but occasionally two.

---

• A. Blank repeat label, dynamic group label, no repeat content outside group

  • Central - will warn about the blank repeat label but is allowed
  • Collect
    • From highest level ToC view, one tap into repeat, then the repeat # is shown followed by the group label, one tap to select the repeat/group element, one tap to select a question and the form is presented (3x taps from top level to being able to answer a question)
    • Under form title you see [group label] in small grey text, no repeat element #
    • Adding a repeat shows 'Add another?' dialogue
  • Enketo
    • The repeat label is blank
    • Group label is displayed inside repeat (blue bg) but in larger font, like the repeat label would be
    • Cannot collapse the entire repeat as no icon at the repeat level, can only collapse each group individually
    • Add repeat is only "", not possible to show text here so no impact of a blank repeat label
    • Each element gets it's own group label with the different dynamic text.
  • Webforms
    • the group label value is displayed larger with grey background, how repeat label is usually styled
    • the 'Add' repeat element button only says 'Add'
    • Collapse at grey header only

• B. Static repeat label, dynamic group label, no repeat content outside group

  • Central - no warnings
  • Collect
    • From highest level ToC view, one tap into repeat, then the repeat # is shown followed by the group label, one tap to select the repeat/group element, one tap to select a question and the form is presented (3x taps from top level to being able to answer a question)
    • Under the form title you see [repeat label] > [element#} > [group label]
    • Adding a repeat shows 'Add "[repeat label]"?' dialogue
  • Enketo
    • The repeat label is shown outside the blue bg region
    • Group label is shown inside the blue bg region and prepended with »
    • Can collapse the entire repeat
    • Each element gets it's own group label with the different dynamic text.
  • Webforms
    • the group label value is displayed larger with grey background, how repeat label is usually styled, in line with the repeat element #
    • the 'Add' repeat element button says 'Add [repeat label]'
    • Collapse at grey header only

• C. Static repeat label, dynamic group label, plus user interface repeat content outside group

  • Central - no warnings
  • Collect
    • From highest level ToC view, one tap into repeat, then the repeat label & # is shown, tap to select, group and non group shown, tap to select, group content shown, tap to enter form. (4x taps from top level to being able to answer a question as you have to select the repeat and the group)
    • Under the form title you see [repeat label] > [element#} > [group label]
    • Adding a repeat shows 'Add "[repeat label]"?' dialogue
  • Enketo
    • Same as when no content outside group.
    • There is no clear indication where the group ends (group content is not indented / no hairline at end of group or box around group plus label), but collapsing the group only leaves the content outside the group shown.
  • Webforms
    • different to when no content outside group
    • The repeat label is displayed with the grey background in line with repeat element #, the group label is displayed inside the repeat box
    • There is no clear indication where the group ends (group content is not indented / no hairline at end of group or box around group plus label), but collapsing the group only leaves the content outside the group shown.
    • the 'Add' repeat element button says 'Add [repeat label]'
    • Collapse at grey header and at group label

• D. Static repeat label, dynamic group label, plus hidden (calculate) repeat content outside group

• Central - no warnings
• Collect
  • ToC nav behaves as for B - 3x taps from top level to form, only # Group selected, not Repeat # & Group.
  • repeat/group label behaves as for C - shows repeat > # > label
• Enketo
  • As for B
• Webforms
  • Behaves as for C

• E. Dynamic repeat label, dynamic group label, no repeat content outside group

  • Central - no warnings
  • Collect
    • ToC nav as for B, 3x taps from top level to form, only # Group selected, not Repeat # & Group.
    • repeat/group label behaves as for C - shows repeat > # > label
    • Only element #1 value shown for repeat label at top level but small grey label in form is correct for each element
  • Enketo
    • As for B, but the single repeat label only shows the value from element #1
  • Webforms
    • As for B, but the 'add repeat' label only shows the value from element #1

[JenniferQ]

@ahblake thanks for posting these findings! Are any of these differences a blocker or barrier to the workflow you're building?