These classes are reserved. You cannot define classes derived from the
      System- base class.
            
                
                    | Class | Description | More | 
                
                    | System-Cache-Dependency | Supports internal operations, for caches that are saved to the database. V6.1 |  | 
                
                    | System-Cache-Entry | Supports internal operations, for caches that are saved to the database. V6.1 |  | 
                
                    | System-Cache-Implementation | Supports internal operations, for caches that are saved to the database. V6.1 |  | 
                
                    | 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_decchgtable. |  | 
                
                    | System-Locks | Contains facts about a lock. | Understanding object
 locking | 
                
                    | System-Queue-CaseType | Supports calculations defined in case type rules. V61 | More about Case Type rules | 
                
                    | System-Queue-DefaultEntry | Supports queued requests for agent
 processing by Standardagents. Proj-911
 5.4 | Queue-for-Agent
 method | 
                
                    | System-Queue-ExecutionRequest-Connect-Default | Supports asynchronous processing of
 SOAP connector requests by the Pega-IntSvcs agent.5;5
 GRP-255 | About Connect Request Processor data instances | 
                
                    | System-Queue-ExecutionRequest-Service-Default | Supports asynchronous processing of
 service requests by the Pega-IntSvcs agent. Proj-911
 5.4 | About Service Request Processor data instances | 
                
                    | System-Queue-ServiceLevel | Supports service-level calculations
 and escalations by the Pega-ProCom agents. 5.5 | 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 object is created. After Lucene indexing is
 complete, the agent queue entry is removed. 5.5
 GRP-654 | Working with the
 PegaRULES database — System tables |