# IApplySchema.h File Reference

`#include <FdoStd.h>`
`#include <Fdo/Commands/ICommand.h>`
`#include <Fdo/Schema/FeatureSchema.h>`
`#include <Fdo/Commands/Schema/PhysicalSchemaMapping.h>`

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## Classes
class | FdoIApplySchema
| The FdoIApplySchema interface defines the ApplySchema command, which creates or updates a feature schema within the DataStore. Input to the ApplySchema command is the feature schema instance to be created or updated. Optionally, a provider-specific FdoIPhysicalSchemaMapping interface can be specified that can be used to control how the feature schema elements are mapped into physical storage. More...