Is the Bentley DGN iFilter compatible with SharePoint 2013 server?
Based on the information found, the Sharepoint has a DGN iFilter which allows you to search and identify PDF and Microsoft Office files like. doc, .xls, .ppt, etc.
To implement the filter, use the link that leads to the TechNet website: http://blogs.technet.com/b/sharepointdevelopersupport/archive/2013/05/13/how-to-implement-a-custom-ifilter-in-sharepoint-2013.aspx
