Electronic Device Description Language (EDDL) is an international standard (IEC-61804) used to describe an object model of the product for integration into a host system via an encoded file (EDD). The EDD encoded file content differs based on the protocol and type of product supported. However, the EDD can describe any product type (PLC, Multiplexer, Gateway, transmitter, actuator, etc.). The EDD is loaded by an EDD host which will use the file to provide a human readable version of data received from the device. 

You can find some general information on the EDDL site (this is a separate site not maintained by the FieldComm Group). FieldComm Group member companies also have information regarding the benefits of EDD Support for EDD is more than just FieldComm Group. Other protocols such as PROFIBUS which are independent of the FieldComm Group are also supporters of EDD.

You should review the FieldComm Group support portal.  There are several articles on how to proceed and the portal provides an opportunity to ask specific support questions.

The best way to proceed with EDD development is Attend, Purchase, Download and Read, and Develop.

Attend a Device Integration Workshop

Purchase HART DD-IDE to begin developing the HART DD, Purchase the FF DD-IDE to begin developing the FF DD, or Purchase the FDI Package IDE which will be extended to offer a single platform for DD and FDI Package development. Note that there are several options available including multi-protocol IDEs and multi-seat license options. The HART DD-IDE includes sample EDD sourcecode, device emulator, tokenizer, editor, and standard import libraries. You can read information regarding it on the support portal There are also details  of the FDI IDE and FF DD-IDE available on the support portal.

Download and read the HART EDD Specifications (TS20500 and TS20501). Download and read the FF EDD Specifications (TS30900 and TS30901). Download and read the FDI Specifications (see list of specifications)

You obtain access to the technical specifications by filing a request

You may also find interest in books and support from various member companies who offer EDD development services.