According to Russian philologist Aleksey Shakhmatov

Aleksey Shakhmatov

Aleksey Aleksandrovich Shakhmatov was an outstanding Russian philologist credited with laying foundations for the science of textology.-Biography:...

, Novgorodsko-Sofiysky Svod is a tentative name for a hypothetical common source for the Novgorod Fourth Chronicle

Novgorod Fourth Chronicle

The Novgorod Fourth Chronicle is a Russian chronicle of 15th century. It is traditionally called "Fourth" according to the order of the modern publication of Novgorod chronicles, rather than chronologically....

 and the Sofia First Chronicle

Sofia First Chronicle

The Sofia First Chronicle is a Russian chronicle associated with the St. Sophia Cathedral, Novgorod, Russia. Its copies exist in two versions: Early Redaction , which ends by 1418 and Later Redaction , with sporadic additions up to 1471, and up to 1508 in one of the copies.Together with the...

.

Shakhmatov initially dated it by 1448 (hence it also used to be called 1448 compilation; ), but later revised his opinion to 1430s. Some Russian philologists shared his opinion, while others attribute the common source to the 1418 compilation of Photius, Metropolitan of Moscow

Photius, Metropolitan of Moscow

Photius of Kiev , Metropolitan of Kiev and all Rus', Metropolitan of Moscow and all Russia, of Greek descent....

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