# How to initialize ODA STEP SDK for using SDAI API ?
1. [FAQ](/faq)
2. »
3. [STEP](/faq/step)
### The main initialization procedure is the same as for STEP SDK C++ API usage:
```
```
```
// Common ODA IFC SDK initialization part
```
```
OdStaticRxObject svcs;
```
```
odrxInitialize(&svcs);
```
```
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();
```
```
```
```
// Preload schema which is used within c:\\file.step
```
```
SdaiString schemaFileName = "c:\\AP214E3_2010.exp";
```
```
sdaiGetSchema(schemaFileName);
```
```
```
```
SdaiRep repo = _sdaiCreateRepositoryFromFile(session, "c:\\file.step", "");
```
```
SdaiRep repoOpened = sdaiOpenRepositoryBN(session, "c:\\file.step ");
```
```
SdaiModel modelRO = sdaiAccessModelBN(repoOpened, "default", sdaiRO);
```
```
SdaiSet cartesianPoints = sdaiGetEntityExtentBN(modelRO, "cartesian_point");
```
```
SdaiIterator it = sdaiCreateIterator(cartesianPoints);
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```
for (sdaiBeginning(it); sdaiNext(it);)
```
```
{
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```
SdaiAppInstance inst = nullptr;
```
```
sdaiGetAggrByIterator(it, sdaiINSTANCE, &inst);
```
```
...
```
```
}
```
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sdaiDeleteIterator(it);
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sdaiCloseSession(session);
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```
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// Common ODA IFC SDK uninitialization part
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odStepUninitialize();
```
```
odrxUninitialize();
```
exSDAISAS example which uses SDAI calls may be investigated additionally to get information of how to create modules which use SDAI.