A typical Lokad account contains two separate trees:
The script tree, which contains all Envision scripts, synchronization scripts, and script sequences.
The file tree, which contains all data files.
These are hierarchies of folders that can contain scripts (respectively, files) or nested folders. Each folder, script or file has a unique text identifier based on its location, which is called its path.
/ is the path of the root folder that contains everything else.
/input/catalog.csv is a typical path for a “catalog” input file uploaded to the account. It would appear in a read "/input/catalog.csv" statement, or in a schema '/input/catalog.csv' definition.
/.utilities/Functions is a typical path for a module containing shared functions within an account. It would appear in an import "/.utilities/Functions" statement.