Cargo Features

Isbn has no features set by default.

[dependencies]
isbn = { version = "0.4.0", features = ["runtime-ranges", "serialize"] }
runtime-ranges = indexmap, quick-xml

Affects isbn::range

serialize = serde

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

quick-xml runtime-ranges?

Enables quick-xml ^0.22.0

indexmap runtime-ranges?

Enables indexmap ^1.7.0

serde serialize?