Character Level Embedding

[KazutoshiShinoda]

BiDAF/layers/char_embedding.py

Line 28 in 3e5ac9c

x = x.sum(2) # (N, seq_len, c_embd_size)

I feel strange to see this code.
Why do you sum over word_len dimension?
Why don't you apply 1D filter over word_len dimension?

Thank you.