| FOLDER | Must be a path to package folder (or empty) |
| CATEGORY | Must be a valid category to filter classes (and methods) by category/package. |
| Empty | the folder to store category/package code is contribution folder. |
| ID aNumber | the folder is another contribution of the same user. |
| USER/FRAMEWORK | storage folder is a framework of the user. |
| USER/ID | storage folder is a contribution folder of another user. |