Comment on Show HN: Investorsexchange.jl – parse trade-level stock market data in JuliaparentComments−daenney4yIt's not illegal in domain names. Take a look at the SRV type in the domain name system. It's underscores galore.However, for host names or for a URL's host component, you're limited to hyphens.In this case though it's just the name of a Julia package[1], which isn't bound by either the rules of domain names or host names as .jl is not a TLD.[1]: https://pkgdocs.julialang.org/v1/creating-packages/#Package-...
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It's not illegal in domain names. Take a look at the SRV type in the domain name system. It's underscores galore.
However, for host names or for a URL's host component, you're limited to hyphens.
In this case though it's just the name of a Julia package[1], which isn't bound by either the rules of domain names or host names as .jl is not a TLD.
[1]: https://pkgdocs.julialang.org/v1/creating-packages/#Package-...