Just to clarify, from the formspec section of the Xowiki docs:
"The form-field class form_page allows to fill fields with instances of certain forms. One can e.g. define a form "Person" with a few form instance pages. The form field will list the possible values for selection."
I understand this to mean that all instances of 'Person' in this xowiki would be displayed in the form_page field, and I see that there is the facility to add a 'where' clause.
But what I am not clear on is how to make this 'where' clause say effectively "where instances of 'Person' are child objects of this xowiki.FormPage instance.
Regards & thanks,
Richard