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Data Exchange / Persistance

Jonathan Gould's picture

Does anyone know the if/when the data exchange toolkit will be published ? I'm interested in importing trimmed IGES surfaces.

Does anyone know how persistant objects will be done in OpenCascade ? In the old Cascade it was done with Object Store.


Philippe Centa's picture

Persistence was NOT by Objectstore but in ascii files or CArchive if Windows. By the way Objectstore was used for meta-data when requested (Euclid/Design Manager API). I don't have seen its announcement for LINUX.

Sana Abou-Haidar's picture

Concerning the availability of the Data Exchange Component it will be published early march 2000. It will include IGES and STEP standard data exchange.

Daniel Brunier-Coulin's picture

More precisely, Object Store was used in an early version of CAS.CADE in order to save application data. It has been abandoned a long time ago. Application data are now saved in a flat ASCII file.

Nevertheless, the process of data saving is based on the Open CASCADE persistence mechanism, that is:

- Data written in a file are described by classes known as persistent. The persistent classes used by the application define the persistent data model of the application. They make up a formal definition of how data are organized in the file.

- During the process of saving the data and opening a file, the application converts its runtime data (the data on which it operates, or transient data) to and from the persistent data model.

- Open CASCADE provides a function to write and read a persistent data model into and from a file.

In the next publication, a new module (Application Framework) will entend Open CASCADE with a Data Framework providing a ready-to-use save/open function.

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