In 1901, this was declared the standard definition of the German language. Standard German orthography subsequently went essentially unrevised until 1998, when the German spelling reform of 1996 was officially promulgated by government representatives of Germany, Austria, Liechtenstein, and Switzerland. After the reform, German spelling underwent an eight-year transitional period, during which the reformed spelling was taught in most schools, while traditional and reformed spelling co-existed in the media.