# BART - Input format

**URL:** </static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fbart-input-format%2F1078%3E%5C
**Category:** Intermediate\
**Created:** [September 11, 2020, 10:01am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fbart-input-format%2F1078 "2020-09-11T10:01:11Z")\
**Posts on this page:** 1\
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**Author:** ![sshleifer](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/sshleifer/32/3304_2.png) [@sshleifer](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fsshleifer)%5C
**Post date:** [September 11, 2020, 3:02pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fbart-input-format%2F1078%2F2 "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](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fwhat-i-know-and-dont-know-about-sequence-to-sequence-batching%2F1046). 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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