LSP is an advanced web template language based on XML technology. LSP provides powerful and easy to use presentation logic, but keeps business logic and technical details out of templates. LSP is compiled into Java bytecode for efficient execution.
LSP pages can be used as an alternative to JSP in a Java Servlet based web application.
Go to http://www.staldal.nu/lsp/.
Read the User Guide.
Read the API documentation (Javadoc).