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@@ -21,4 +21,20 @@ A web application to migrate data from various sources (i.e. files, DBs, APIs) a
   - restrictions if data can not work for graph (LT)
 
 - Save to PDF
-- Export to XLSX
\ No newline at end of file
+- Export to XLSX
+
+## Classes
+- Tables - what data sources are converted into and what is exported from nodes
+- Nodes
+  - Filter Node (filter out data from tables with matching criteria)
+  - Relate Node (join different tables)
+  - Transform Node (mutate data structures)
+  - Graph Node (map table data to fit what is needed for a graph)
+- Graph - takes in a Graph Nodes return value then returns a graph element
+
+## Application Independent Rules (Use Cases)
+- Create Tables from file
+- Create Filter Node
+- Create Relate Node
+- Create Transform Node
+- Create Graph Node