| 214 | == Identification of course elements == |
| 215 | |
| 216 | A course can change over time. |
| 217 | Elements (lessons, exercises, sets) may be added, deleted, or reordered. |
| 218 | |
| 219 | A student has a "context" in a course - a sequential position, |
| 220 | and a set of review items. |
| 221 | What if the course changes, and these items change or disappear? |
| 222 | |
| 223 | Each element may be given a "logical name". |
| 224 | For items, this defaults to the file name. |
| 225 | |
| 226 | A user's sequential position is stored in the DB as the logical name |
| 227 | or last item viewed. |
| 228 | On continuation, Bolt looks up that item. |
| 229 | |