The Arden Syntax server harbors the Arden Syntax medical logic modules (MLMs). These knowledge packages are written, tested, and compiled using the integrated Arden Syntax development environment (IDE). To connect the server with host systems and data sources, Medexter offers three basic forms of technical integration into different health information technology (IT) environments. Using the first form of integration, MLM and event calls are realized by SOAP or RESTful web services, with the respective service also transferring the necessary data required for MLM processing. Examples are (a) the connection between Medexter’s Arden Syntax server and Siemens’ (Xetra: SIE, NYSE: SI, LSE: SIE, SWX: SIN) hospital information system i.s.h.med via SOAP web services, and (b) calling of and providing data for the iPhone and iPad App Hepaxpert via RESTful web services.