diff --git a/01.workspace/Cargo.lock b/01.workspace/Cargo.lock
index 59bc00c..d93ae50 100644
--- a/01.workspace/Cargo.lock
+++ b/01.workspace/Cargo.lock
@@ -2,6 +2,211 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "bumpalo"
+version = "3.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fd1289c04a9ea8cb22300a459a72a385d7c73d3259e2ed7dcb2af674838cfa9"
+
+[[package]]
+name = "getrandom"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi",
+ "wasi",
+]
+
 [[package]]
 name = "heave"
 version = "0.1.0"
+dependencies = [
+ "short-uuid",
+]
+
+[[package]]
+name = "js-sys"
+version = "0.3.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec48937a97411dcb524a265206ccd4c90bb711fca92b2792c407f268825b9305"
+dependencies = [
+ "once_cell",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.176"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58f929b4d672ea937a23a1ab494143d968337a5f47e56d0815df1e0890ddf174"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+checksum = "89ae43fd86e4158d6db51ad8e2b80f313af9cc74f5c0e03ccb87de09998732de"
+dependencies = [
+ "unicode-ident",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce25767e7b499d1b604768e7cde645d14cc8584231ea6b295e9c9eb22c02e1d1"
+dependencies = [
+ "proc-macro2",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
+
+[[package]]
+name = "short-uuid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58bea582e8f851430ff43e07edfc4c30b6a418f2ec4b6fed3f8496537e41a5df"
+dependencies = [
+ "uuid",
+]
+
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+checksum = "ede7c438028d4436d71104916910f5bb611972c5cfd7f89b8300a8186e6fada6"
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+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f87b8aa10b915a06587d0dec516c282ff295b475d94abf425d62b57710070a2"
+dependencies = [
+ "getrandom",
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "wasi"
+version = "0.14.7+wasi-0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "883478de20367e224c0090af9cf5f9fa85bed63a95c1abf3afc5c083ebc06e8c"
+dependencies = [
+ "wasip2",
+]
+
+[[package]]
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+checksum = "0562428422c63773dad2c345a1882263bbf4d65cf3f42e90921f787ef5ad58e7"
+dependencies = [
+ "wit-bindgen",
+]
+
+[[package]]
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+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "rustversion",
+ "wasm-bindgen-macro",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "671c9a5a66f49d8a47345ab942e2cb93c7d1d0339065d4f8139c486121b43b19"
+dependencies = [
+ "bumpalo",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ca60477e4c59f5f2986c50191cd972e3a50d8a95603bc9434501cf156a9a119"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f07d2f20d4da7b26400c9f4a0511e6e0345b040694e8a75bd41d578fa4421d7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bad67dc8b2a1a6e5448428adec4c3e84c43e561d8c9ee8a9e5aabeb193ec41d1"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "wit-bindgen"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f17a85883d4e6d00e8a97c586de764dabcc06133f7f1d55dce5cdc070ad7fe59"
diff --git a/01.workspace/heave/Cargo.toml b/01.workspace/heave/Cargo.toml
index 60c5d54..dabcaa6 100644
--- a/01.workspace/heave/Cargo.toml
+++ b/01.workspace/heave/Cargo.toml
@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+short-uuid = "0.2.0"
diff --git a/01.workspace/heave/src/imp/entity_to_value.rs b/01.workspace/heave/src/imp/entity_to_value.rs
new file mode 100644
index 0000000..e9c6a0c
--- /dev/null
+++ b/01.workspace/heave/src/imp/entity_to_value.rs
@@ -0,0 +1,10 @@
+use crate::*;
+
+impl ToValue for Entity {
+    fn to_value(self) -> Value {
+        self.id.to_value()
+    }
+}
+
+// #[cfg(test)]
+// mod unit_tests { use super::*; }
diff --git a/01.workspace/heave/src/imp/mod.rs b/01.workspace/heave/src/imp/mod.rs
index 2a2fbc0..7c0cdca 100644
--- a/01.workspace/heave/src/imp/mod.rs
+++ b/01.workspace/heave/src/imp/mod.rs
@@ -1,4 +1,5 @@
 pub mod bool_to_value;
+pub mod entity_to_value;
 pub mod f64_to_value;
 pub mod i64_to_value;
 pub mod string_to_value;
diff --git a/01.workspace/heave/src/str/entity.rs b/01.workspace/heave/src/str/entity.rs
index 9eebb27..49ed4fc 100644
--- a/01.workspace/heave/src/str/entity.rs
+++ b/01.workspace/heave/src/str/entity.rs
@@ -2,6 +2,7 @@ use crate::*;
 
 #[derive(Debug, Default, PartialEq, Clone)]
 pub struct O {
+    pub id: String,
     pub class: String,
     pub attributes: std::collections::HashMap<String, Attribute>,
 }
@@ -9,6 +10,7 @@ pub struct O {
 impl O {
     pub fn new(class: &str) -> Self {
         Self {
+            id: short_uuid::short!().to_string(),
             class: String::from(class),
             attributes: std::collections::HashMap::new(),
         }