Pega Clipboard is a temporary memory area on the server that is associated with every connected Pega Platform requestor, including browser-based users and unauthenticated guest users . It has a hierarchical structure consisting of nodes known as pages, most of which have a name and an associated class .
Pega Platform organizes pages on the clipboard into four categories.
User Pages
The User Pages category contains pages created due to user action, either directly or indirectly. User pages contain data related to work being performed in the selected thread. While a user processes a case, all the pages used to store data about the case are listed in the User Pages category. For example, the data you enter onto a form is stored on the user page pyWorkPage. Likewise, when a developer configures or tests a rule, all the pages that store data used by the rule are listed in this category.
Data Pages
The Data Pages category contains read-only data pages defined by data page rules. Data pages cache in memory data sourced elsewhere, such as from a third-party service or a system of record.
Linked Property Pages
The Linked Property Pages contains read-only pages created by linked properties, which contain information from data objects referenced by a linked property.
Linked properties are advanced data constructs, typically created and configured by more senior developers.
System Pages
The System Pages category contains pages that describe the current user session, such as the active user and the active application. For example, while a user is logged in to Pega Platform, Pega Platform maintains a clipboard page containing information about the user, such as their current time zone.
Thread -
A PegaRULES Thread object is a named context of clipboard pages. It does not correspond to a UNIX or Windows operating system thread. Most processing for a requestor is single-threaded. The pxThread page is a named top-level clipboard page sometimes referred to as the thread page. The class for the page is Code-Pega-Thread
STANDARD : This is a default thread that is initiated automatically when the user logs into Pega instance.
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