service agreement. A contract entered into for a contractor to provide some form of useful task for their employers in return for compensation. A service agreement can also be a feature offered along with a warranty for a product for the manufacturer to provide service or coverage of any costs of service in case the product malfunctions during a given period.
Euridice (1600) is the first surviving opera. The libretto was by Rinuccini, music by Peri, with some portions by Caccini. This was also significant in that it used recitative, a foundation of operatic storytelling. But--what was the first great opera? My vote is for Monteverdi's Orfeo, libretto by Striggio, premiered in 1607.
Wagner's second opera, and his first to be performed, has many signs of an early work: the style is modelled closely on contemporary French and Italian comic opera. It is also referred to as the forgotten comedy, in that only two of Wagner's works are comedies, the other being Die Meistersinger von Nuernberg. nÃ¼rnbergn Das Liebesverbot, because it is a comedy, the outcome is a happy one: unrestrained sexuality wins as the orgiastic carnival of the entire population goes rioting on after curtain-fall.