Before revision: The Paris foot , Paris inch and Paris line could be abbreviated with the prime symbol ( ′ ), double prime symbol ( ″ ) , and triple prime symbol ( ‴ ) respectively, like some other inch and foot units.
After revision: The abbreviations are the same as for other inch and foot units, i.e: for Paris foot an unique prime symbol ( ′ ), double prime symbol ( ″ ) and for Paris line a triple prime symbol ( ‴ ) for Paris inch a