The Standard Data Form (SDF) documents Natura 2000 sites and is regularly updated based on best available information. The first, and currently valid, SDF was adopted in 1997 (Decision 97/266/EC). Since 2008 the Expert Group on Reporting have been revising the SDF with a view to improving the availability and quality of data needed for the Natura 2000 network. The increased availability of digital spatial data has been taken into account. Additionally, certain important gaps have been filled (e.g. information on the percentage of marine areas within the sites) and necessary improvements made to the structure of the data on ecological information.
The fast development of information technology for data management as well as the increasing availability of digital geographical information and analysis tools have also informed the revision. Therefore no paper maps or forms are required any longer and data needs to be provided in electronic format only.
More about SDF on http://ec.europa.eu/environment/nature/legislation/habitatsdirective/index_en.htm#sdf