diff --git a/examples/metadata_bench.rs b/examples/metadata_bench.rs
new file mode 100644
index 0000000..9eb6645
--- /dev/null
+++ b/examples/metadata_bench.rs
@@ -0,0 +1,16 @@
+use remote_hdt::error::RemoteHDTError;
+use remote_hdt::metadata::Metadata;
+use remote_hdt::storage::params::Serialization;
+use remote_hdt::storage::params::Backend;
+use remote_hdt::storage::params::ReferenceSystem;
+
+fn main() -> Result<(), RemoteHDTError> {
+ 
+    let rdf_path  = "";
+    let metadata_path = "";
+    let fields = vec!["X_pos", "Y_pos"];
+    let mut metadata: Metadata = Metadata::new(Serialization::Zarr);
+    metadata.serialize(rdf_path, ReferenceSystem::SPO,metadata_path,fields).unwrap();
+
+    Ok(())
+}
diff --git a/src/lib.rs b/src/lib.rs
index 1968cf7..ecb6ec0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,3 +4,4 @@ pub mod error;
 mod io;
 pub mod storage;
 mod utils;
+pub mod metadata;
diff --git a/src/metadata/mod.rs b/src/metadata/mod.rs
new file mode 100644
index 0000000..e2b3c00
--- /dev/null
+++ b/src/metadata/mod.rs
@@ -0,0 +1,82 @@
+
+
+
+use std::default;
+use std::path::PathBuf;
+use std::str::FromStr;
+
+
+use crate::dictionary::Dictionary;
+
+use crate::io::Graph;
+use crate::io::RdfParser;
+
+use crate::storage::params::Serialization;
+use crate::storage::params::Backend;
+use crate::storage::params::ReferenceSystem;
+use crate::error::RemoteHDTError;
+
+use fcsd::Set;
+use zarrs::opendal::raw::oio::StreamExt;
+use zarrs::opendal::services::Fs;
+use zarrs::opendal::services::Http;
+use zarrs::opendal::Operator;
+use zarrs::storage::store::OpendalStore;
+use zarrs::array::Array;
+
+
+
+pub type MetadataResult<T> = Result<T, RemoteHDTError>;
+
+pub struct Metadata {
+    flatten_graph: Vec<(u32, u32, u32)>,
+    serialization: Serialization,
+    dictionary : Dictionary,
+    array: Option<Array<OpendalStore>>
+}
+
+
+impl Metadata{
+    pub fn new( serialization: Serialization) -> Self {
+        Metadata {
+           flatten_graph: Vec::<(u32, u32, u32)>::default(),
+           serialization: serialization,
+           dictionary: Dictionary::default(),
+           array: None,
+        }
+    }
+    
+    
+  
+   
+    pub fn serialize(&mut self, rdf_path: &str, reference_system: ReferenceSystem, metadata_path: &str, fields: Vec<&str>) -> MetadataResult<&mut Self>{
+
+        let graph_vector: Graph;
+
+        match RdfParser::parse(rdf_path, &reference_system) {
+            Ok((graph, dictionary)) => {
+                graph_vector = graph;
+                self.dictionary = dictionary;
+            }
+            Err(_) => return Err(RemoteHDTError::RdfParse),
+        };
+
+        let mut count = 0;
+        for i in graph_vector.iter() {
+            for j in i.iter(){
+                self.flatten_graph.push((count, j.0, j.1))
+            }
+            count +=1;
+        }
+
+
+        Ok(self)
+    }
+
+
+   
+
+    
+
+    
+}
\ No newline at end of file