By default, a directory has no data attribute, and the data attribute of a file which is not a directory has no name.
NTFS has an advantage: as you can have several data attributes for a file, you can easily implement HFS whose files are made of two parts (also called forks in the HFS terminology): a resource part and a data part. For the data part, you use default unnamed data attribute, and for the resource part, you use a data attribute named e.g. 'resource'.
| Offset to the beginning of the stream | Length | Description |
|---|---|---|
| 0 | Any data |