OSID - osid.OsidNode Service Interface Definition

Interface	osid.OsidNode
Implements	`osid.Identifiable`
Implements	`osid.Containable`
Description	A node interface for hierarchical objects. The `Id` of the node is the `Id` of the object represented at this node.
Method	isRoot
Description	Tests if this node is a root in the hierarchy (has no parents). A node may have no more parents available in this node structure but is not a root in the hierarchy. If both `isRoot()` and `hasParents()` is false, the parents of this node may be accessed thorugh another node structure retrieval.
Return	`boolean`	`true` if this node is a root in the hierarchy, `false` otherwise
Compliance	`mandatory`	This method must be implemented.
Method	hasParents
Description	Tests if any parents are available in this node structure. There may be no more parents in this node structure however there may be parents that exist in the hierarchy.
Return	`boolean`	`true` if this node has parents, `false` otherwise
Compliance	`mandatory`	This method must be implemented.
Method	getParentIds
Description	Gets the parents of this node.
Return	`osid.id.IdList`	the parents of this node
Compliance	`mandatory`	This method must be implemented.
Method	isLeaf
Description	Tests if this node is a leaf in the hierarchy (has no children). A node may have no more children available in this node structure but is not a leaf in the hierarchy. If both `isLeaf()` and `hasChildren()` is false, the children of this node may be accessed thorugh another node structure retrieval.
Return	`boolean`	`true` if this node is a leaf in the hierarchy, `false` otherwise
Compliance	`mandatory`	This method must be implemented.
Method	hasChildren
Description	Tests if any children are available in this node structure. There may be no more children available in this node structure but this node may have children in the hierarchy.
Return	`boolean`	`true` if this node has children, `false` otherwise
Compliance	`mandatory`	This method must be implemented.
Method	getChildIds
Description	Gets the children of this node.
Return	`osid.id.IdList`	the children of this node
Compliance	`mandatory`	This method must be implemented.