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Simple Quantities in the MicroStation CONNECT Edition
In today’s ever increasingly complex AEC work environments, drawings often contain a mixture of both graphical and business data. Graphical data is the design geometry represented in a drawing. This can be made up of simple lines, curves, and polygons or more complex solids, surfaces and meshes. This graphical data may also include text, dimensions and notes. Business data is the real-world information associated with the items represented by the graphics in the drawing.

If you consider a DGN model representing a facility, the facility can be made up of pumps, vessels, valves, pipes, and so on. These items can be represented graphically but may also have related business data defining their nongraphical properties. Examples of nongraphical properties may include a part number, manufacturer, material, identification number, pressure rating and so on.

Why is this useful? Business data can be obtained from a variety of sources, including the following:

- MicroStation: Created in MicroStation.

- Supplied by a vertical application such as OpenRoads Designer or AECOsim Building Designer.

- Brought in from outside sources such as geographic shapefiles or Industry Foundation Class (IFC) files.

MicroStation works with different types of business data and defines the types of business items it will use. These different “Item Types” are organized and stored in domain-specific Libraries. When an item type such as a pump is to be created, the application can then use the “pump” Item Type to determine the different business properties available and gives you the ability to define specific property values when creating a pump.

In MicroStation, business data includes:

- Item Types – Item types define the business properties for a specific type of item.

- Items – Items are the individual representations of an Item type. For example, a facility might have a Centrifugal Pump Item Type defined but have multiple pumps represented in the design. Each pump would have the same properties but different values of these properties.

- Relationship Types – Just as items are categorized by their types, relationships are also categorized by types. The relationship types generally convey some information about the nature of the relationship between the items. For example, a Pump item might have an “is annotated by” relationship with an annotation item. Similarly, it may also have an “equipment has nozzle“ relationship with a Nozzle item.

- Libraries – Libraries hold a collection of Item Types and Relationship Types, usually related to a specific domain. You might have one library with Building Item Types and another Library with Plant Item Types.


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Published 2019-01-23 00:00:00