diff --git a/src/history/changes.rs b/src/history/changes.rs
new file mode 100644
index 0000000..aa6bd07
--- /dev/null
+++ b/src/history/changes.rs
@@ -0,0 +1,144 @@
+use crate::{
+    db::{self, DatabaseConnection},
+    stelae::{archive::Archive, types::repositories::Repository},
+};
+use sophia::{api::{ns::{rdf, NsTerm}, prelude::*, term::SimpleTerm}, turtle::parser::turtle::TurtleParser};
+use sophia::inmem::graph::LightGraph;
+use sophia::xml::parser;
+use sophia::turtle::serializer::nt::NtSerializer;
+use sophia::{api::ns::Namespace, inmem::graph::FastGraph};
+use std::path::{Path, PathBuf};
+use walkdir::WalkDir;
+/// Inserts changes from the archive into the database
+///
+/// # Errors
+/// Errors if the changes cannot be inserted into the archive
+// const NAMESPACE_URL: &str = "https://open.law/us/ngo/oll/_ontology/v0.1/ontology.owl#";
+// const OLL: Namespace<&str> = Namespace::new(NAMESPACE_URL).unwrap();
+
+// const DOCUMENT_VERSION: NsTerm = OLL.get("DocumentVersion").unwrap();
+
+#[actix_web::main]
+pub async fn insert(
+    raw_archive_path: &str,
+    archive_path: PathBuf,
+    stele: Option<String>,
+) -> std::io::Result<()> {
+    let conn = match db::init::connect(&archive_path).await {
+        Ok(conn) => conn,
+        Err(err) => {
+            tracing::error!(
+                "error: could not connect to database. Confirm that DATABASE_URL env var is set correctly."
+            );
+            tracing::error!("Error: {:?}", err);
+            std::process::exit(1);
+        }
+    };
+    if let Some(stele) = stele {
+        insert_changes_single_stele()?;
+    } else {
+        insert_changes_archive(&conn, raw_archive_path, &archive_path).unwrap_or_else(|err| {
+            tracing::error!("Failed to insert changes into archive");
+            tracing::error!("{:?}", err);
+        });
+    }
+    Ok(())
+}
+
+fn insert_changes_single_stele() -> std::io::Result<()> {
+    Ok(())
+}
+
+/// Insert changes from the archive into the database
+fn insert_changes_archive(
+    conn: &DatabaseConnection,
+    raw_archive_path: &str,
+    archive_path: &Path,
+) -> anyhow::Result<()> {
+    let archive = Archive::parse(
+        archive_path.to_path_buf(),
+        &PathBuf::from(raw_archive_path),
+        false,
+    )?;
+
+    for (name, mut stele) in archive.stelae {
+        if let Some(repositories) = stele.get_repositories()? {
+            let Some(rdf_repo) = repositories.get_rdf_repository() else {
+                continue;
+            };
+            let rdf_repo_path = archive_path.to_path_buf().join(&rdf_repo.name);
+            if !rdf_repo_path.exists() {
+                anyhow::bail!(
+                    "RDF repository should exist on disk but not found: {}",
+                    rdf_repo_path.display()
+                );
+            }
+            insert_changes_from_rdf_repository(conn, rdf_repo_path, &name, rdf_repo)?;
+        }
+    }
+    Ok(())
+}
+
+/// Insert changes from the RDF repository into the database
+fn insert_changes_from_rdf_repository(
+    conn: &DatabaseConnection,
+    rdf_repo_path: PathBuf,
+    name: &str,
+    rdf_repo: &Repository,
+) -> anyhow::Result<()> {
+    tracing::info!("Inserting changes from RDF repository: {}", name);
+    tracing::info!("RDF repository path: {}", rdf_repo_path.display());
+
+    // let response = reqwest::get(NAMESPACE_URL).await?.text().await?;
+    let mut graph = FastGraph::new();
+
+    for entry in WalkDir::new(&rdf_repo_path) {
+        match entry {
+            Ok(entry) if is_rdf(&entry) => {
+                tracing::debug!("Parsing file: {:?}", entry.path());
+                let file = std::fs::File::open(entry.path())?;
+                let reader = std::io::BufReader::new(file);
+                parser::parse_bufread(reader).add_to_graph(&mut graph)?;
+            }
+            Ok(entry) => {
+                tracing::debug!("Skipping non-RDF file: {:?}", entry.path());
+                continue;
+            }
+            Err(err) => {
+                tracing::error!("Error reading file: {:?}", err);
+            }
+        }
+    }
+    let namespace_url = "https://open.law/us/ngo/oll/_ontology/v0.1/ontology.owl#";
+    let oll: Namespace<&str> = Namespace::new(namespace_url).unwrap();
+
+    let document_version: NsTerm = oll.get("DocumentVersion").unwrap();
+    let doc_id = oll.get("docId").unwrap();
+    // println!("Graph: {:?}", graph);
+    let documents = graph.triples_matching(Any, Any, [document_version]);
+
+    for triple in documents {
+        let triple = triple.unwrap();
+        let document = triple.s();
+
+        let mut doc_id_triples = graph.triples_matching(
+            [document],
+            [doc_id],
+            Any,
+        );
+        for t in doc_id_triples {
+            // println!("t: {:?} {:?} {:?}", t?.s(), t?.p(), t?.o());
+            let object = t?.o();
+            if let SimpleTerm::LiteralDatatype(value, _) = object {
+                dbg!(&value);
+            }
+
+        }
+    }
+    Ok(())
+}
+
+/// Check if the entry is an RDF file
+fn is_rdf(entry: &walkdir::DirEntry) -> bool {
+    entry.path().extension() == Some("rdf".as_ref())
+}
diff --git a/src/history/mod.rs b/src/history/mod.rs
new file mode 100644
index 0000000..12a0080
--- /dev/null
+++ b/src/history/mod.rs
@@ -0,0 +1,2 @@
+pub mod changes;
+pub mod rdf_namespaces;
\ No newline at end of file
diff --git a/src/history/rdf_namespaces.rs b/src/history/rdf_namespaces.rs
new file mode 100644
index 0000000..05261f3
--- /dev/null
+++ b/src/history/rdf_namespaces.rs
@@ -0,0 +1,5 @@
+// use sophia::api::ns::Namespace;
+
+// const NAMESPACE_URL: &str = "https://open.law/us/ngo/oll/_ontology/v0.1/ontology.owl#";
+
+// pub const OLL: Namespace = Namespace::new(NAMESPACE_URL).unwrap();