Components of the KEfED editor system. The user employs a web browser to interact with a Flash-based graphical interface. The interface uses a storage system, currently the Persevere noSQL database, for experimental design and experimental data storage. PowerLoom is used to provide inference services in support of interpreting neural connectivity observations. An external web service such as the NCBO BioPortal  provides access to ontological terms for semantic annotation of KEfED models.