diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..23fd35f
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "editor.formatOnSave": true
+}
\ No newline at end of file
diff --git a/src/graph.rs b/src/graph.rs
new file mode 100644
index 0000000..8f4d728
--- /dev/null
+++ b/src/graph.rs
@@ -0,0 +1,142 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+pub enum NodeConfiguration {
+    FileNode,
+    MoveMoneyNode(MoveMoneyNode),
+    MergeNode(MergeNode),
+    DeriveNode(DeriveNode),
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct NodeInfo {
+    pub name: String,
+    pub output_files: Vec<String>,
+    pub configuration: NodeConfiguration,
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum MoveMoneyAmountType {
+    Percent,
+    Amount,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct MoveMoneyRule {
+    pub from_account: String,
+    pub from_cc: String,
+    pub to_account: String,
+    pub to_cc: String,
+    pub value: f64,
+    pub amount_type: MoveMoneyAmountType,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct MoveMoneyNode {
+    pub departments_path: String,
+    pub accounts_path: String,
+    pub gl_path: String,
+    pub rules: Vec<MoveMoneyRule>,
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum JoinType {
+    Left,
+    Inner,
+    Right,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct MergeJoin {
+    pub join_type: JoinType,
+    pub left_column_name: String,
+    pub right_column_name: String,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct MergeNode {
+    pub input_files: Vec<String>,
+    pub joins: Vec<MergeJoin>,
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum DeriveColumnType {
+    Column(String),
+    Constant(String),
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct MapOperation {
+    pub mapped_value: String,
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum DatePart {
+    Year,
+    Month,
+    Week,
+    Day,
+    Hour,
+    Minute,
+    Second,
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum SplitType {
+    DateTime(String, DatePart),
+    Numeric(String, isize),
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum MatchComparisonType {
+    Equal,
+    GreaterThan,
+    LessThan,
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum DeriveOperation {
+    Concat(Vec<DeriveColumnType>),
+    Add(Vec<DeriveColumnType>),
+    Multiply(Vec<DeriveColumnType>),
+    Subtract(DeriveColumnType, DeriveColumnType),
+    Divide(DeriveColumnType, DeriveColumnType),
+    Map(String, Vec<MapOperation>),
+    Split(String, SplitType),
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct DeriveFilter {
+    pub column_name: String,
+    pub comparator: MatchComparisonType,
+    pub match_value: String,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct DeriveRule {
+    pub operations: Vec<DeriveOperation>,
+    pub filters: Vec<DeriveFilter>,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct DeriveNode {
+    pub rules: Vec<DeriveRule>,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct Node {
+    pub id: i64,
+    pub info: NodeInfo,
+    pub dependent_node_ids: Vec<i64>,
+}
+
+impl Node {
+    pub fn has_dependent_nodes(&self) -> bool {
+        !self.dependent_node_ids.is_empty()
+    }
+}
+
+pub struct Graph {
+    pub name: String,
+    pub nodes: Vec<Node>,
+}
diff --git a/src/lib.rs b/src/lib.rs
index dc94163..fb43b19 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,6 +22,7 @@ pub mod filter;
 pub mod upload_to_db;
 
 mod io;
+mod graph;
 
 #[no_mangle]
 pub extern "C" fn move_money_from_text(