Related information
Every connected Pega 7 Platform requestor (including browser-based users, even if unauthenticated guest users) has an associated temporary memory area on the server known as the clipboard. The clipboard has a hierarchical structure, consisting of nodes known as pages, most of which have a name and an associated class.
Pages act as buffers or temporary copies of object instances (of that class) that are copied from, or might later be stored into, the PegaRULES database or another database.
The contents of a page are an unordered list of unique property names (defined as Rule-Obj-Property instances within that class) and optionally a value for each property. On the page, the property value could be:
Properties are added to the clipboard by activities as they execute, and by user input received through <FORM > inputs and Submit buttons. In addition to property names and values, pages can contain messages.
Some clipboard pages could contain other pages, either as embedded pages or as the value of a property that has a property mode of Page, Page List or Page Group. These pages could in turn contain other pages. A reference to a non-existent page in a Page Group property causes a page with that name to be created.