coding_to_odk: Convert a coding object to ODK XLSForm choices
Description
ODK XLSForms link the categorical codings to a variable type name in the
'survey' sheet. The codings are specified in the 'choices' sheet which has
a `list_name` column that holds the variable type names. Each row that has
that name will be associated with that categorical type coding. This function
converts `coding` objects into tables that can be inserted into that
'choices' sheet. The categorical type is specified with the coding `.label`.
Usage
coding_to_odk(coding)
Value
A data.frame or tibble that can be included in an XLSForm 'choices'
sheet