What is the Stargate protocol?

The Stargate protocol is a series of methods and technologies that enable nearly instantaneous travel between two planets or other bodies inside a stable wormhole established with a second Stargate. It was invented by an Alteran named Amelius millions of years ago and later developed by the Ancients. The protocol involves the use of naquadah, a special metal, and a complex system of chevrons and glyphs to set coordinates for interstellar travel.