— 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
Read more