Are XLSForm, ODK XForm and XForms equivalent?

Question

I'm currently looking into XLSForm, ODK XForms and XForms

How do these standards compare in terms of functionality and features?

Can they be considered equivalent or are there substantial differences?

Answer 1

ODK is offline data collection software.

XLSForm is an Excel-based standard used to design forms for ODK. XLSForms get converted to an ODK XForm, but the process is often hidden from the user.

ODK XForms are a subset of W3C XForms used by ODK. They contain a few additional features not found in W3C XForms.

W3C XForms were designed to be the successor to HTML forms you find on the web, but no widely used web browser supports XForms.

Answer 2

XForms is a W3C recommendation which is to be used with browsers.