Introduction

A schema variant is an object used by schema that can hold a single piece of data that can be reassigned with a new value (And possibly type).

The supported types are:

Creating/Destroying

To create a schema variant you call SchemaVariantCreate followed by a call to set some data into it with the appropriate function. Until you have set data into the newly created schema variant the type of the schema variant will be SystemType::Undefined. Calling schema variant functions on undefined schema variants may fail.

When you are finished with a schema variant call SchemaVariantDelete to free the schema variant.

Example

Setting/Changing

You can set/change the value and type of a schema variant with the following calls

Example

Classes

Sometimes the schema framework may need to call functions for a schema variant in order to perform operations like casts. This may require the schema framework to know what class the schema variant belongs to. If you will need to perform class based operations on your schema variants then you should set a schema class for the schema variant by calling SchemaVariantSetSchema

Coercion

Coercion of schema variants is the act of forcing a schema variant to another type.