Atlas — Standard classes derived from the System- base class

The table below lists standard System- classes you may encounter.

These classes are reserved. You cannot define classes derived from the System- base class.

Class	Description	More
System-AppCentric-Cache	Abstract class for the ABA cache	Understanding Application-Based Assembly mode
System-AppCentric-Cache-Dependency	Supports the ABA cache	Understanding Application-Based Assembly mode
System-AppCentric-Cache-Entry	Entries in the ABA cache	Understanding AppCentric operations and caching
System-ApplicationRuleSetIndex	This class lists the RuleSets which are contained in each application rule.
System-Cache-Dependency	Supports internal operations, for caches that are saved to the database.
System-Cache-Entry	Supports internal operations, for caches that are saved to the database.
System-Cache-Implementation	Supports internal operations, for caches that are saved to the database.
System-CachedConclusion	Cache for Java objects corresponding to field value rules, property rules (not property values), property alias rules and class rules.	conclusion cache
System-Declare-Changes	Supports execution of Declare Expression rules. Corresponds to the pr_sys_decchg table.
System-Job-PropertyOptimization	Defines the queue of background processing requested by the Property Optimization wizard. Processing of this queue is performed by the Pega-RulesEngine agent.	About the Property Optimization tool.
System-Locks	Contains facts about a lock.	Understanding object locking
System-Queue-CaseType	Supports calculations defined in case type rules. Processing is performed by the Pega-ProcessEngine agent.	More about Case Type rules
System-Queue-ColumnPopulation	Supports queued requrest for the Pega-RulesEngine agent.	Understanding the Pega-RulesEngine agent
System-Queue-DefaultEntry	Supports queued requests for agent processing by Standard agents.	Queue-for-Agent method
System-Queue-Events	Not used. Reserved for future use.
System-Queue-ExecutionRequest-Connect-Default	Supports asynchronous processing of SOAP connector requests by the Pega-IntSvcs agent.	About Connect Request Processor data instances
System-Queue-ExecutionRequest-Service-Default	Supports asynchronous processing of service requests by the Pega-IntSvcs agent.	About Service Request Processor data instances
System-Queue-FlowDependency	Supports dependency processing, performed by the Pega-ProcessEngine agent	Understanding the Pega-ProcessEngine agent
System-Queue-ScheduledTask	Executes scheduled reports.	Understanding the Pega-RulesEngine agent
System-Queue-ServiceLevel	Supports service-level calculations and escalations by the Pega-ProCom agents.	Understanding the Pega-ProCom agents
System-Requestor-Context	Data for passivated requestors, identified by requestor ID. The data is Base64 encoded.	passivation
System-Status-Nodes	Identify other server nodes participating in your system.	More about System Node data instances
System-SavedPages	Saves Thread contexts for a user after time-out.	time-out
System-Updates-Cache	Identifies rules updated since the most recent system pulse, and so potentially stale in the rule cache of other nodes.	rule cache
System-User-MyRules	Control the delegated rules facility, visible in the My Business Rules area of the Process Work workspace.	About My Rule Gadget
System-Work-Indexer	Supports full-text search for work objects. Used by the Pega-RULES agent to hold agent queue entries after a new work item is created. After Lucene indexing is complete, the agent queue entry is removed.	Working with the PegaRULES database — System tables

	System- base class
	Working with the PegaRULES database — System tables

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