They still begin with an ampersand and end with a semicolon, but instead of friendly text, you use the number sign followed by a unique number code for that character.
Ha ka na-amalite site na ampersand ma na-ejedebe na semicolon, ma kama nke ederede enyi na enyi, ị na-eji akara amaokwu na-esochi koodu nọmba pụrụ iche maka agwa ahụ.