Starting with the code

Cargo.toml

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+[workspace]
+
+members = [
+  "common",
+  "core",
+]

common/Cargo.toml

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+[package]
+name = "common"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

common/src/domain/mod.rs

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+//! Domain information.

common/src/lib.rs

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+pub mod domain;

store/Cargo.toml

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+[package]
+name = "store"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

store/src/domain/mod.rs

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+//! Store own domain.

store/src/lib.rs

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+mod domain;