|   | 
Returns a path relative to the reference directory (argument 2 or current working directory) of the full path name supplied in argument 1.
| Number | Type | Compulsory | Default | Description | 
|---|---|---|---|---|
| 1 | string | Yes | 
 | Full path name | 
| 2 | string | No | Current directory | Reference directory | 
Return type: string
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