Clojure for the Semantic Web

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Date: Thursday, August 7, 2008

Chapter: New York


Host: Dario Laverde, NYC Java Study Groups JUG ( and the NYU Silver Center - New York University

Meetup Track:
This Session is hands on and technical

Speakers: Rich Hickey ( and David Siegel (

Rich Hickey will join forces with the New York Semantic Web Meetup to present Clojure for the use in the development of Semantic Web applications.

Clojure is a dynamic programming language that targets the Java Virtual Machine. It is designed to be a general-purpose language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming. Clojure is a compiled language - it compiles directly to JVM bytecode, yet remains completely dynamic. Every feature supported by Clojure is supported at runtime. Clojure provides easy access to the Java frameworks, with optional type hints and type inference, to ensure that calls to Java can avoid reflection.

Clojure is a dialect of Lisp, and shares with Lisp the code-as-data philosophy and a powerful macro system. Clojure is predominantly a functional programming language, and features a rich set of immutable, persistent data structures. When mutable state is needed, Clojure offers a software transactional memory system and reactive Agent system that ensure clean, correct, multithreaded designs.

Session prep:

Introduction to Clojure

The Reader


Special Forms

Data Structures


Java Interop