MIL-PRF-28000 Digital Representation For Communication Of Product Data: Iges Application Subsets And Iges Application ProtocolsThis specification identifies the requirements to be met when product definition data is delivered in the digital format of the Initial Graphics Exchange Specification \(IGES, in accordance with the American National Standard \(ANS\) / United States Product Data Association \(US PRO\) standard. Discrete subsets and application protocols of the IGES entities are identified by class according to the application for which the digital data was prepared.

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MIL-PRF-28000B

1.2 Classification. The digital representation of product definition data will be one or more of the following

classes as specified in the contract or other form of agreement:

Class 1

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Technical Illustration Subset

Class 2

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Engineering Drawing Subset

Class 3

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Electrical/Electronic Applications Subset (Withdrawn)

Class 4

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Geometry for Numerical Control (NC) Manufacturing Subset

Class 5

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3D Piping Application Protocol (AP)

Class 6

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Layered Electrical Product (LEP) Application Protocol (AP)

Class 7

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3D Geometry Subset

1.2.1 Additional classes. No new classes are anticipated.

1.3 Year 2000 compliance. This performance specification now meets DoD Year 2000 (Y2K) compliance

requirements. The "Y2K" logo is a registered trademark of the United States Government. Details on U.S.

Government Y2K requirements may be referenced at: https://www.y2k.gov