We propose Hilda, a high-level language for developing data-driven web applications. The primary benefits of Hilda over existing de- velopment platforms are: (a) it uses a uni- fied data model for all layers of the applica- tion, (b) it is declarative, (c) it models both application queries and updates, (d) it sup- ports structured programming for web sites, (e) it enables conflict detection for concur- rent updates, and (f) it separates application logic from presentation. We also describe the implementation of a simple proof-of-concept Hilda compiler, which translates a Hilda ap- plication program into Java Servlet code.