To enable data exchange between existing systems we primarily need to focus on the interfaces instead of the electronic medical record systems. Interfaces are used for exchanging messages between electronic data systems. The messages are formatted according to one of many standards that are used in healthcare. The most successful standard enabling such communication is HL7 developed in the mid-eighties starting as a communication standard within hospitals. Many countries in Europe have chosen HL7 as a national strategy in healthcare. As a consequence, ERA-EDTA recently has decided also to use HL7 Version3 as communication standard.

The group of K. Heitmann, M. Stoffel and C.A. Baldamus from Cologne in Germany present an overview in this issue of ERA-EDTA Registry Newsletter. They are experts in the field of HL7 and have great expertise in the acquisition of data in dialysis. They have undertaken the task to adapt one of the the existing HL7-models, namely “patient care provision” to mirror the complete dialysis scenario. It can be expected, that derived specifications from this workinggroup will enable software developers to implement HL7 Version 3 in existing and newly developed electronic medical record systems. A uniquely standardised interface requires the use of standardised coding systems instead of locally developed codes.

It can be expected that with the implementation of HL7 an urgently needed harmonisation of electronic medical record systems will take place in the renal community. The implementation of HL7 is a further step to enhance sharing of data on an international level in the near future.