diff --git a/Cargo.lock b/Cargo.lock
index 9db0c94e..2488bd6b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -867,6 +867,7 @@ dependencies = [
  "oxiri",
  "oxsdatatypes",
  "rand",
+ "serde",
  "thiserror",
 ]
 
@@ -898,6 +899,7 @@ name = "oxsdatatypes"
 version = "0.2.0-alpha.1"
 dependencies = [
  "js-sys",
+ "serde",
  "thiserror",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 4e8ea772..0d3a87ab 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,6 +24,7 @@ rust-version = "1.70"
 
 [workspace.dependencies]
 rocksdb = {git = "https://git.nextgraph.org/NextGraph/rust-rocksdb.git", branch = "master", features = [  ] }
+serde = { version = "1.0.142", features = ["derive"] }
 anyhow = "1.0.72"
 arbitrary = "1.3"
 assert_cmd = "2.0"
diff --git a/lib/oxrdf/Cargo.toml b/lib/oxrdf/Cargo.toml
index 12b4ba60..23622471 100644
--- a/lib/oxrdf/Cargo.toml
+++ b/lib/oxrdf/Cargo.toml
@@ -23,6 +23,7 @@ oxiri.workspace = true
 oxsdatatypes = { workspace = true, optional = true }
 rand.workspace = true
 thiserror.workspace = true
+serde.workspace = true
 
 [lints]
 workspace = true
diff --git a/lib/oxrdf/src/blank_node.rs b/lib/oxrdf/src/blank_node.rs
index 4bf82391..2fe02c26 100644
--- a/lib/oxrdf/src/blank_node.rs
+++ b/lib/oxrdf/src/blank_node.rs
@@ -1,4 +1,5 @@
 use rand::random;
+use serde::{Deserialize, Serialize};
 use std::io::Write;
 use std::{fmt, str};
 
@@ -16,10 +17,10 @@ use std::{fmt, str};
 /// assert_eq!("_:a122", BlankNode::new("a122")?.to_string());
 /// # Result::<_,oxrdf::BlankNodeIdParseError>::Ok(())
 /// ```
-#[derive(Eq, PartialEq, Debug, Clone, Hash)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash, Serialize, Deserialize)]
 pub struct BlankNode(BlankNodeContent);
 
-#[derive(PartialEq, Eq, Debug, Clone, Hash)]
+#[derive(PartialEq, Eq, Debug, Clone, Hash, Serialize, Deserialize)]
 enum BlankNodeContent {
     Named(String),
     Anonymous { id: u128, str: IdStr },
@@ -246,7 +247,7 @@ impl PartialEq<BlankNodeRef<'_>> for BlankNode {
     }
 }
 
-#[derive(PartialEq, Eq, Debug, Clone, Hash)]
+#[derive(PartialEq, Eq, Debug, Clone, Hash, Serialize, Deserialize)]
 struct IdStr([u8; 32]);
 
 impl IdStr {
diff --git a/lib/oxrdf/src/literal.rs b/lib/oxrdf/src/literal.rs
index 5f7ab9e0..d59855fe 100644
--- a/lib/oxrdf/src/literal.rs
+++ b/lib/oxrdf/src/literal.rs
@@ -3,6 +3,7 @@ use crate::vocab::{rdf, xsd};
 use oxilangtag::{LanguageTag, LanguageTagParseError};
 #[cfg(feature = "oxsdatatypes")]
 use oxsdatatypes::*;
+use serde::{Deserialize, Serialize};
 use std::borrow::Cow;
 use std::fmt;
 use std::fmt::Write;
@@ -31,10 +32,10 @@ use std::fmt::Write;
 /// );
 /// # Result::<(), LanguageTagParseError>::Ok(())
 /// ```
-#[derive(Eq, PartialEq, Debug, Clone, Hash)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash, Serialize, Deserialize)]
 pub struct Literal(LiteralContent);
 
-#[derive(PartialEq, Eq, Debug, Clone, Hash)]
+#[derive(PartialEq, Eq, Debug, Clone, Hash, Serialize, Deserialize)]
 enum LiteralContent {
     String(String),
     LanguageTaggedString { value: String, language: String },
diff --git a/lib/oxrdf/src/named_node.rs b/lib/oxrdf/src/named_node.rs
index 9b545bcc..41a55169 100644
--- a/lib/oxrdf/src/named_node.rs
+++ b/lib/oxrdf/src/named_node.rs
@@ -1,4 +1,5 @@
 use oxiri::{Iri, IriParseError};
+use serde::{Deserialize, Serialize};
 use std::cmp::Ordering;
 use std::fmt;
 
@@ -14,7 +15,7 @@ use std::fmt;
 /// );
 /// # Result::<_,oxrdf::IriParseError>::Ok(())
 /// ```
-#[derive(Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Hash)]
+#[derive(Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Hash, Serialize, Deserialize)]
 pub struct NamedNode {
     iri: String,
 }
diff --git a/lib/oxrdf/src/triple.rs b/lib/oxrdf/src/triple.rs
index d5526c19..a27057b2 100644
--- a/lib/oxrdf/src/triple.rs
+++ b/lib/oxrdf/src/triple.rs
@@ -2,10 +2,11 @@ use crate::blank_node::BlankNode;
 use crate::literal::Literal;
 use crate::named_node::NamedNode;
 use crate::{BlankNodeRef, LiteralRef, NamedNodeRef};
+use serde::{Deserialize, Serialize};
 use std::fmt;
 
 /// The owned union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri) and [blank nodes](https://www.w3.org/TR/rdf11-concepts/#dfn-blank-node).
-#[derive(Eq, PartialEq, Debug, Clone, Hash)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash, Serialize, Deserialize)]
 pub enum NamedOrBlankNode {
     NamedNode(NamedNode),
     BlankNode(BlankNode),
@@ -152,7 +153,7 @@ impl<'a> From<NamedOrBlankNodeRef<'a>> for NamedOrBlankNode {
 }
 
 /// The owned union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri), [blank nodes](https://www.w3.org/TR/rdf11-concepts/#dfn-blank-node)  and [triples](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-triple) (if the `rdf-star` feature is enabled).
-#[derive(Eq, PartialEq, Debug, Clone, Hash)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash, Serialize, Deserialize)]
 pub enum Subject {
     NamedNode(NamedNode),
     BlankNode(BlankNode),
@@ -382,7 +383,7 @@ impl<'a> From<&'a NamedOrBlankNode> for SubjectRef<'a> {
 
 /// An owned RDF [term](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-term)
 /// It is the union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri), [blank nodes](https://www.w3.org/TR/rdf11-concepts/#dfn-blank-node), [literals](https://www.w3.org/TR/rdf11-concepts/#dfn-literal) and [triples](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-triple) (if the `rdf-star` feature is enabled).
-#[derive(Eq, PartialEq, Debug, Clone, Hash)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash, Serialize, Deserialize)]
 pub enum Term {
     NamedNode(NamedNode),
     BlankNode(BlankNode),
@@ -937,7 +938,7 @@ impl<'a> From<TripleRef<'a>> for Triple {
 
 /// A possible owned graph name.
 /// It is the union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri), [blank nodes](https://www.w3.org/TR/rdf11-concepts/#dfn-blank-node), and the [default graph name](https://www.w3.org/TR/rdf11-concepts/#dfn-default-graph).
-#[derive(Eq, PartialEq, Debug, Clone, Hash, Default)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash, Default, Serialize, Deserialize)]
 pub enum GraphName {
     NamedNode(NamedNode),
     BlankNode(BlankNode),
diff --git a/lib/oxsdatatypes/Cargo.toml b/lib/oxsdatatypes/Cargo.toml
index d0e8aafd..184b5d77 100644
--- a/lib/oxsdatatypes/Cargo.toml
+++ b/lib/oxsdatatypes/Cargo.toml
@@ -19,6 +19,7 @@ custom-now = []
 
 [dependencies]
 thiserror.workspace = true
+serde.workspace = true
 
 [target.'cfg(all(target_family = "wasm", target_os = "unknown"))'.dependencies]
 js-sys = { workspace = true, optional = true }
diff --git a/lib/oxsdatatypes/src/boolean.rs b/lib/oxsdatatypes/src/boolean.rs
index c881765c..4a0c0d37 100644
--- a/lib/oxsdatatypes/src/boolean.rs
+++ b/lib/oxsdatatypes/src/boolean.rs
@@ -1,11 +1,14 @@
 use crate::{Decimal, Double, Float, Integer};
+use serde::{Deserialize, Serialize};
 use std::fmt;
 use std::str::{FromStr, ParseBoolError};
 
 /// [XML Schema `boolean` datatype](https://www.w3.org/TR/xmlschema11-2/#boolean)
 ///
 /// Uses internally a [`bool`].
-#[derive(Debug, Clone, Copy, Default, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[derive(
+    Debug, Clone, Copy, Default, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize, Deserialize,
+)]
 #[repr(transparent)]
 pub struct Boolean {
     value: bool,
diff --git a/lib/oxsdatatypes/src/date_time.rs b/lib/oxsdatatypes/src/date_time.rs
index 579f72b7..ad5e888d 100644
--- a/lib/oxsdatatypes/src/date_time.rs
+++ b/lib/oxsdatatypes/src/date_time.rs
@@ -1,6 +1,7 @@
 #![allow(clippy::expect_used)]
 
 use crate::{DayTimeDuration, Decimal, Duration, YearMonthDuration};
+use serde::{Deserialize, Serialize};
 use std::cmp::{min, Ordering};
 use std::fmt;
 use std::hash::{Hash, Hasher};
@@ -10,7 +11,7 @@ use std::str::FromStr;
 ///
 /// It encodes the value using a number of seconds from the Gregorian calendar era using a [`Decimal`]
 /// and an optional timezone offset in minutes.
-#[derive(Eq, PartialEq, PartialOrd, Debug, Clone, Copy, Hash)]
+#[derive(Eq, PartialEq, PartialOrd, Debug, Clone, Copy, Hash, Serialize, Deserialize)]
 pub struct DateTime {
     timestamp: Timestamp,
 }
@@ -1452,7 +1453,7 @@ impl fmt::Display for GDay {
 /// A timezone offset with respect to UTC.
 ///
 /// It is encoded as a number of minutes between -PT14H and PT14H.
-#[derive(Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Copy, Hash)]
+#[derive(Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Copy, Hash, Serialize, Deserialize)]
 pub struct TimezoneOffset {
     offset: i16, // in minute with respect to UTC
 }
@@ -1562,7 +1563,7 @@ struct DateTimeSevenPropertyModel {
     timezone_offset: Option<TimezoneOffset>,
 }
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
 struct Timestamp {
     value: Decimal,
     timezone_offset: Option<TimezoneOffset>,
@@ -3140,7 +3141,7 @@ mod tests {
     fn custom_now() {
         #[allow(unsafe_code)]
         #[no_mangle]
-        extern "Rust" fn custom_ox_now() -> Duration {
+        fn custom_ox_now() -> Duration {
             Duration::default()
         }
         DateTime::now();
diff --git a/lib/oxsdatatypes/src/decimal.rs b/lib/oxsdatatypes/src/decimal.rs
index 3383ad48..a8f1016d 100644
--- a/lib/oxsdatatypes/src/decimal.rs
+++ b/lib/oxsdatatypes/src/decimal.rs
@@ -1,4 +1,5 @@
 use crate::{Boolean, Double, Float, Integer, TooLargeForIntegerError};
+use serde::{Deserialize, Serialize};
 use std::fmt;
 use std::fmt::Write;
 use std::str::FromStr;
@@ -12,7 +13,9 @@ const DECIMAL_PART_POW_MINUS_ONE: i128 = 100_000_000_000_000_000;
 /// It stores the decimal in a fix point encoding allowing nearly 18 digits before and 18 digits after ".".
 ///
 /// It stores the value in a [`i128`] integer after multiplying it by 10¹⁸.
-#[derive(Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Copy, Hash, Default)]
+#[derive(
+    Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Copy, Hash, Default, Serialize, Deserialize,
+)]
 pub struct Decimal {
     value: i128, // value * 10^18
 }
diff --git a/lib/oxsdatatypes/src/double.rs b/lib/oxsdatatypes/src/double.rs
index 12937ada..fe6ac762 100644
--- a/lib/oxsdatatypes/src/double.rs
+++ b/lib/oxsdatatypes/src/double.rs
@@ -1,4 +1,5 @@
 use crate::{Boolean, Float, Integer};
+use serde::{Deserialize, Serialize};
 use std::cmp::Ordering;
 use std::fmt;
 use std::num::ParseFloatError;
@@ -10,7 +11,7 @@ use std::str::FromStr;
 /// Uses internally a [`f64`].
 ///
 /// <div class="warning">Serialization does not follow the canonical mapping.</div>
-#[derive(Debug, Clone, Copy, Default, PartialEq)]
+#[derive(Debug, Clone, Copy, Default, PartialEq, Serialize, Deserialize)]
 #[repr(transparent)]
 pub struct Double {
     value: f64,
diff --git a/lib/oxsdatatypes/src/duration.rs b/lib/oxsdatatypes/src/duration.rs
index 719bfad2..b42bf7e2 100644
--- a/lib/oxsdatatypes/src/duration.rs
+++ b/lib/oxsdatatypes/src/duration.rs
@@ -1,4 +1,5 @@
 use crate::{DateTime, Decimal};
+use serde::{Deserialize, Serialize};
 use std::cmp::Ordering;
 use std::fmt;
 use std::str::FromStr;
@@ -7,7 +8,7 @@ use std::time::Duration as StdDuration;
 /// [XML Schema `duration` datatype](https://www.w3.org/TR/xmlschema11-2/#duration)
 ///
 /// It stores the duration using a pair of a [`YearMonthDuration`] and a [`DayTimeDuration`].
-#[derive(Eq, PartialEq, Debug, Clone, Copy, Hash, Default)]
+#[derive(Eq, PartialEq, Debug, Clone, Copy, Hash, Default, Serialize, Deserialize)]
 pub struct Duration {
     year_month: YearMonthDuration,
     day_time: DayTimeDuration,
@@ -293,7 +294,9 @@ impl PartialOrd for Duration {
 /// [XML Schema `yearMonthDuration` datatype](https://www.w3.org/TR/xmlschema11-2/#yearMonthDuration)
 ///
 /// It stores the duration as a number of months encoded using a [`i64`].
-#[derive(Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Copy, Hash, Default)]
+#[derive(
+    Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Copy, Hash, Default, Serialize, Deserialize,
+)]
 pub struct YearMonthDuration {
     months: i64,
 }
@@ -460,7 +463,9 @@ impl PartialOrd<YearMonthDuration> for Duration {
 /// [XML Schema `dayTimeDuration` datatype](https://www.w3.org/TR/xmlschema11-2/#dayTimeDuration)
 ///
 /// It stores the duration as a number of seconds encoded using a [`Decimal`].
-#[derive(Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Copy, Hash, Default)]
+#[derive(
+    Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Copy, Hash, Default, Serialize, Deserialize,
+)]
 pub struct DayTimeDuration {
     seconds: Decimal,
 }
diff --git a/lib/oxsdatatypes/src/float.rs b/lib/oxsdatatypes/src/float.rs
index 99274316..83922c02 100644
--- a/lib/oxsdatatypes/src/float.rs
+++ b/lib/oxsdatatypes/src/float.rs
@@ -1,4 +1,5 @@
 use crate::{Boolean, Double, Integer};
+use serde::{Deserialize, Serialize};
 use std::cmp::Ordering;
 use std::fmt;
 use std::num::ParseFloatError;
@@ -10,7 +11,7 @@ use std::str::FromStr;
 /// Uses internally a [`f32`].
 ///
 /// <div class="warning">Serialization does not follow the canonical mapping.</div>
-#[derive(Debug, Clone, Copy, Default, PartialEq)]
+#[derive(Debug, Clone, Copy, Default, PartialEq, Serialize, Deserialize)]
 #[repr(transparent)]
 pub struct Float {
     value: f32,
diff --git a/lib/oxsdatatypes/src/integer.rs b/lib/oxsdatatypes/src/integer.rs
index 6e01d1f2..6df15362 100644
--- a/lib/oxsdatatypes/src/integer.rs
+++ b/lib/oxsdatatypes/src/integer.rs
@@ -1,4 +1,5 @@
 use crate::{Boolean, Decimal, Double, Float};
+use serde::{Deserialize, Serialize};
 use std::fmt;
 use std::num::ParseIntError;
 use std::str::FromStr;
@@ -6,7 +7,9 @@ use std::str::FromStr;
 /// [XML Schema `integer` datatype](https://www.w3.org/TR/xmlschema11-2/#integer)
 ///
 /// Uses internally a [`i64`].
-#[derive(Debug, Clone, Copy, Default, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[derive(
+    Debug, Clone, Copy, Default, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize, Deserialize,
+)]
 #[repr(transparent)]
 pub struct Integer {
     value: i64,