Checklist

• 1. If the issue you raised is not a feature but a question, please raise a discussion at https://github.com/sgl-project/sglang/discussions/new/choose Otherwise, it will be closed.
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Motivation

xgrammar supports EBNF. We would like to integrate this feature into SGLang.

We can add a new parameter called ebnf in sampling_params.py and treat it similar to regex and JSON.

Related resources

https://xgrammar.mlc.ai/docs/how_to/ebnf_guided_generation.html