This document discusses the social function, generic structure, and language features of a formal invitation text. It begins by stating that a formal invitation follows an established dignified form and style according to norms and customs. It then lists the social function as inviting people to formal events. The generic structure includes the name of the host, expression of invitation, event details, date, time, venue, and RSVP. Key language features are the use of simple, precise language and a formal, friendly tone with careful word choice and simple present tense. An example formal invitation is then provided following the generic structure.