The sequence to the encoder (decoder)

1

There are two required parameters for the nn.transformer module
(src - the sequence to the encoder (required) and tgt - the sequence to the decoder (required))
Is src (tgt) the length of a sentence or is it the length of a dictionary?
I already tried different options, but transformer absolutely does not want to learn.

2

I have vocab, sentence, word.
src - the sequence to the encoder - what does this apply to?

src
src1234×830 4.33 KB

3 
src – the sequence to the encoder (required).

Does anyone know what src means?