# How to use SDAI API with ODA STEP SDK?
1. [FAQ](/ja/faq)
2. »
3.
### Here is an example of C++ SDAI API usage that shows how to obtain collection of entities with "cartesian\_point" type and iterate through them:
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// Common ODA IFC SDK initialization part
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OdStaticRxObject svcs;
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odrxInitialize(&svcs);
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odStepInitialize(false /* No CDA */, false /* No geometry calculation needed */);
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// SDAI calls can be performed just after common initialization procedure
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SdaiSession session = sdaiOpenSession();
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// Preload schema which is used within c:\\file.step
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SdaiString schemaFileName = "c:\\AP214E3_2010.exp";
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sdaiGetSchema(schemaFileName);
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SdaiRep repo = _sdaiCreateRepositoryFromFile(session, "c:\\file.step", "");
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SdaiRep repoOpened = sdaiOpenRepositoryBN(session, "c:\\file.step ");
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SdaiModel modelRO = sdaiAccessModelBN(repoOpened, "default", sdaiRO);
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SdaiSet cartesianPoints = sdaiGetEntityExtentBN(modelRO, "cartesian_point");
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SdaiIterator it = sdaiCreateIterator(cartesianPoints);
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for (sdaiBeginning(it); sdaiNext(it);)
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{
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SdaiAppInstance inst = nullptr;
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sdaiGetAggrByIterator(it, sdaiINSTANCE, &inst);
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...
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}
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sdaiDeleteIterator(it);
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sdaiCloseSession(session);
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// Common ODA IFC SDK uninitialization part
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odStepUninitialize();
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odrxUninitialize();
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exSDAISAS example which uses SDAI calls may be investigated additionally to get information of how to create modules which use SDAI.