# Make a selection from a roster created from groups rather than repeats (alternative to select\_one ${repeat})

**URL:** <https://forum.getodk.org/t/make-a-selection-from-a-roster-created-from-groups-rather-than-repeats-alternative-to-select-one-repeat/32466>\
**Category:** Support\
**Tags:** form-design\
**Created:** [February 17, 2021, 9:19am UTC](https://forum.getodk.org/t/make-a-selection-from-a-roster-created-from-groups-rather-than-repeats-alternative-to-select-one-repeat/32466 "2021-02-17T09:19:52Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![LN](https://getodk.b-cdn.net/user_avatar/forum.getodk.org/ln/32/1605_2.png) [@LN](https://forum.getodk.org/u/LN)\
**Post date:** [February 23, 2021, 10:34pm UTC](https://forum.getodk.org/t/make-a-selection-from-a-roster-created-from-groups-rather-than-repeats-alternative-to-select-one-repeat/32466/10 "2021-02-23T22:34:28Z")

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The problem isn't with the choice filter, it's with the `age` column in the choice list. You can use a value from the form as a choice label because label text is dynamically evaluated. However, you can't use a value from the form as a choice name or other property name.

As @Grzesiek2010 describes, what you're trying to do is possible with repeats. If you're not comfortable using repeats, you could have a final question for each child that means your age criteria that says something like "Pick this child?" with a constraint that makes sure only one is picked. You could also have multiple questions after the roster has been created that look like "Pick ${c\_1a}? Yes/No", etc. You can use relevance to hide the children you don't want picked and use a constraint to ensure only one is picked.

(For XPath enthusiasts, once we introduce `local-name()` as described in [Proposal: customize name and label 'columns' in selects from external data in XLSForm - #8 by LN](https://forum.getodk.org/t/proposal-customize-name-and-label-columns-in-selects-from-external-data-in-xlsform/27265/8), we would be able to build an itemset with an expression like `starts-with(local-name(), "ch")` if all child nodes of `ch1`, `ch2`, etc have identical names. I doubt we'd expose this in XLSForm, though.)

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