| 
Class Summary | 
| AsyncRequest | 
An Asynchronous Request, that will be kept in the KBUtils in order to be
 monitored an acted upon. | 
| DictionaryItem | 
Key-Value pair holder for PropertyValue lists of key-value pairs (i.e. | 
| Entity | 
An entity is a concrete instance of some EntityType. | 
| EntityType | 
An entity type describes the type of an instance. | 
| Entry | 
A key-value pair entry holder. | 
| Measurement | 
Logs the moment when a property value was measured. | 
| Notification | 
A Notification describes what should happen when a Trigger is fired. | 
| Plan | 
Reference to a preservation plan, to be used by external assessment. | 
| Property | 
A Property defines a specific part of Entity in the world that have
 the same EntityType, i.e. | 
| PropertyValue | 
Each Property Value is the atomic measurement of a Property for an
 Entity measured in a specific point in time. | 
| Question | 
Questions are predefined points of interest related directly or indirectly to
 Source and Property. | 
| Source | 
A Source represents certain aspects of the world for which there exists a
 known way of investigating certain properties that represent these aspects. | 
| SourceAdaptor | 
A software unit that is able to collect specific information from a specific
 Source and has the capability to convert/adapt it into a
 representation that fits the internal data model of Watch. | 
| Trigger | 
A Trigger is a unit that contains conditions used during internal assessment
 and Notification that are sent when the conditions are met. |