If an error occurred, the response indicates why the request failed. Refer to Section 4, HSI Responses , for more information about responses and to HSI Return Codes for a listing of HSI error responses. Nodes can be subdirectories, or file descriptors. The origin of the tree is called the root. Branching out from the root are descendant nodes.
Descendant nodes can be subdirectories or file descriptors.
Each root or subdirectory node contains a list of its descendants. It contains information about the file, such as its size and hierarchy ID, but not the actual file data. File descriptor nodes cannot have descendants. File trees, when illustrated, are customarily shown as inverted. The root is shown at the top with descendant nodes beneath it.