When calling a page from another page, it seems possible only to submit a single parameter, the "page caller". In particular when the page is used as "New/Edit" for a new object. However, the same page is used for "New" and "Edit", so in some cases the page caller will be empty. I would like to provide a list of objects that needs to be associated to the current object. How can I find this list of objects, when the page caller is empty? Is it possible to provide additional parameters for a page?
You can not pass data this way. I you want to constrain objects create a helper object with a reference set to a objects.