Editing Intergraph Standard File Formats

{{More sources needed|date=May 2022}}

'''Intergraph Standard File Formats''' ('''ISFF''') are the file formats common to [[MicroStation]] and [[Intergraph]]'s [[Interactive Graphics Design System]] (IGDS). ISFF is made available to the public, so that third-party developers could create applications for MicroStation that read and write ISFF format without a license from Intergraph.<ref>{{Cite web |title=Intergraph Standard File Format information  *.isff  – FileDict.com |url=http://en.filedict.com/isff-intergraph-standard-file-format-13383/ |access-date=2024-04-06 |language=en-US}}</ref>

*'''Design files''', or '''DGN files''' (*.dgn) are [[binary file]]s with variable-length records for graphic elements, and non-graphic data.  
*'''Cell library''' files (*.cel) are binary files that store cell definitions for placement in design files.

MicroStation versions 8 and newer support the [[V8 DGN]] file format, but which has a different internal data structure than the ISFF-based DGN.  In cases where there is potential for confusion, ISFF-based DGN may be called '''Intergraph DGN''', or '''V7 DGN'''.

Autodesk has chosen not to support DGN in [[AutoCAD]] 2006, although it does support the format in its Map3D, Land Desktop, and Civil3D products.

==References==
{{Reflist}}

==External links==
*{{cite web | url=http://dgnlib.maptools.org/dgn.html | title=Intergraph Standard File Formats (Element Structure) }}

[[Category:CAD file formats]]


{{CAD-software-stub}}