# BART - Input format

**URL:** <https://discuss.huggingface.co/t/bart-input-format/1078>\
**Category:** Intermediate\
**Created:** [September 11, 2020, 10:01am UTC](https://discuss.huggingface.co/t/bart-input-format/1078 "2020-09-11T10:01:11Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![sshleifer](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/sshleifer/32/3304_2.png) [@sshleifer](https://discuss.huggingface.co/u/sshleifer)\
**Post date:** [September 11, 2020, 3:02pm UTC](https://discuss.huggingface.co/t/bart-input-format/1078/2 "2020-09-11T15:02:36Z")

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- This is a **great** question and super confusing.
- You can get a good snapshot of my understanding [here](https://discuss.huggingface.co/t/what-i-know-and-dont-know-about-sequence-to-sequence-batching/1046). I don’t think that will clear everything up, but if you could read that and let me know what you still don’t understand it would be helpful.
- If I encounter empirical evidence that I should change `decoder_start_token_id` for any model I will do so.

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