Read this: Mahayana schools recognize all or part of the Mahayana Sutras. Some of these sutras became for Mahayanists a manifestation of the Buddha himself, and faith in and veneration of those texts are stated in some sutras (e.g. the Lotus Sutra and the Mahaparinirvana Sutra) to lay the foundations for the later attainment of Buddhahood itself.

Mahayana schools recognize all or part of what?
What is the answer? (If it cannot be answered, return "unanswerable")
Mahayana Sutras