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OASIS |
  
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OASIS |
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OASIS Format:
The Open Artwork System Interchange Standard (OASIS) was designed by the SEMI consortium as a modern alternative to the GDSII standard. A draft specification (SEMI Document 3626 2003/04/23) of the OASIS format standard was circulated, and subsequently adopted with very minor changes. The final standard document is available from the SEMI organization.
OASIS enables the representation of IC layout data in a much more compact format than GDS-II, and incorporates hierarchical data into the mask-making infrastructure. OASIS has been developed by a working group under the sponsorship of the SEMI Data Path Task Force, and was approved in June 2003. OASIS
files offer on average a >10X reduction in size compared to GDS-II. Some of the reasons for this file size reduction are due to OASIS' ability to handle variable length integers, optimize coordinates by using delta's, eliminate redundant data with variable modulation (for layers, data types, x, y, point lists, etc.) and flexible repetition.
