One of the challenges to the full expression of collaboration on construction projects is sharing information including geometry, properties, scans in the form of reality meshes, descriptions and status of equipment, and other information. In the dark ages of design information exchange was by paper. At one time $2 billion of FedEx business was shipping paper drawings between project teams. The next step was converting paper drawings to PDF files which enabled drawings and other information to be sent electronically rather than relying on FedEx. But the data in PDF remains opaque to applications such as AutoCAD, Microstation, Revit, Microsoft Excel, and other applications which only know how to read application-specific DWG, DGN, RVT, or XLS files. iModels are Bentley's way of packaging project information, in the form of application-readable file formats, in a container that can be shared with other project teams. There are iModel plugins for other vendors' products, such as Revit, for example, which enables rich data to be exchanged between Revit and Bentley BIM.
iModel Version 1.0, which is widely used as evidenced by the the number of submissions to the Be Inspired awards that uses it, comprises a collection of files. Each file is accessible to the application that created it, for example, Microstation or Revit, but not to others.
Yesterday in his keynote at the Year in Infrastructure 2017 (YII2017) conference, Greg Bentley, CEO of Bentley, announced iModel 2.0 and this morning Keith Bentley, who is the founder of Bentley, described what iModel 2.0 is technically. It is no longer a collection of files, but a relational database. This enables all the information to be queried by all applications, not just the one that created the data.
Furthermore, Keith described iModelHub which adds data versioning making iModel 2.0 a versioned database which records changes in the data. iModelHub allows you to compare different versions to see what has changed. This is a powerful capability for construction projects which are constantly changing but which need to enable managers (and lawyers) to know what changed and when.
The is a very important advance which will allow much richer information to be shared by many applications. Additionally, iModelHub enables iModels to be shared via the cloud which dramatically expands accessibility to project information especially when used in conjunction with a collaboration enabler such as Bentley's ProjectWise.
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