However , other bases for letter encodings have also been observed , and therefore such extended extended locators might not be compatible .
Most often the extending is done by repeating alternating subsquare and square rules ( base numbers 24 and 10 respectively ) .
Other bases for letter encodings have also been observed , and therefore such extended extended locators might not be compatible .
Most often the extending is done by repeating alternating subsquare and square rules ( base numbers 24 and 10 respectively ) .