The contract also included an option for a 12-month extension. It has the .vcs file extension. Address locator files have a .loc file extension. All Gherkin files have the codice 2 file extension. Anthony refused to sign a proposed contract extension. Construction of the extension beyond Lechmere has begun. This expansion became known as the "Brand Extension". There is a difference between brand extension and line extension. The usual filename extension is codice 1. Currently more than of tunnels on the extension project have been excavated. Thus resulting in a domain with .local extension. Let formula 1 be a "field extension". Work continued on the rest of the northern extension. PolyP was the first generic programming language extension to Haskell. It is the maximal Galois extension of .