OSID - osid.search.EngineNode Service Interface Definition

Interface	osid.search.EngineNode
Implements	`osid.OsidNode`
Used By	`osid.search.EngineHierarchySession`
Used By	`osid.search.EngineNodeList`
Description	This interface is a container for a partial hierarchy retrieval. The number of hierarchy levels traversable through this interface depend on the number of levels requested in the `EngineHierarchySession`.
Method	getEngine
Description	Gets the `Engine` at this node.
Return	`osid.search.Engine`	the engine represented by this node
Compliance	`mandatory`	This method must be implemented.
Method	getParentEngineNodes
Description	Gets the parents of this engine.
Return	`osid.search.EngineNodeList`	the parents of the `id`
Compliance	`mandatory`	This method must be implemented.
Method	getChildEngineNodes
Description	Gets the children of this engine.
Return	`osid.search.EngineNodeList`	the children of this engine
Compliance	`mandatory`	This method must be implemented.