Story Book 533 | CAPM Day 26 🚀#OperationSelfLearnings Today I transformed a basic SAP CAP sample application into a mini enterprise procurement backend inside SAP Business Application Studio. ☁️ What started as a simple “Books” demo evolved into: ✔ Products API ✔ Suppliers API ✔ PurchaseOrders API ✔ OData V4 services ✔ SQLite-backed persistence ✔ Fiori Preview validation One of the most important learnings today: Enterprise applications are built layer-by-layer. I implemented: CDS Data Models → OData Service Exposure → CSV Seed Data → CAP Runtime → Fiori Preview UI I also experienced a real engineering transition: ❌ Removing old sample CatalogService ✔ Replacing it with custom EnterpriseService ✔ Designing my own enterprise domain structure Current mock enterprise landscape: 🔹 Product Master Data 🔹 Supplier/Vendor Data 🔹 Procurement Transactions This is no longer “tutorial execution”. This is system modeling and enterprise API design. 🧠 Learning continues: SAP BTP | CAP | OData | ...