| Interface | Description | 
|---|---|
| Attachment | 
 Any type of content that is be associated with
 a task or with a process instance. 
 | 
| Comment | 
 User comments that form discussions around tasks. 
 | 
| Event | Deprecated | 
| IdentityLink | 
 An identity link is used to associate a task with a certain identity. 
 | 
| NativeTaskQuery | 
 Allows querying of  
Tasks via native (SQL) queries | 
| Task | 
 Represents one task for a human user. 
 | 
| TaskQuery | 
 Allows programmatic querying of  
Tasks; | 
| Class | Description | 
|---|---|
| IdentityLinkType | 
 Contains constants for all types of identity links that can be used to involve a 
 user or group with a certain task. 
 | 
| Enum | Description | 
|---|---|
| DelegationState | 
 Defines the different states of delegation that a task can be in. 
 | 
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