It's work in Survey CTO but not work in ODK
ODK Message me:
Thanks,
Noyon
Welcome to the ODK forum, @Noyon! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a picture as your avatar because it helps build community!
The functions available in ODK are listed in the main documentation and in the XPath functions documentation, and item-present() doesn't appear to be a valid function.