Bool creates a Conv object for converting booleans.

DictOptional sets the optional flag, which suppresses the error in case the key doesn't exist or results in an error.

DictRequired sets the required flag, which forces an error even if fields are optional by default.

Float creates a Conv object for converting floats.

Ifc creates a schema.Conv object for converting the given data to interface.

Int creates a Conv object for converting integers.

Str creates a schema.Conv object for converting strings.

StrFromNum creates a schema.Conv object that transforms numbers to strings.

Time creates a Conv object for converting Time objects.

SchemaOption is for adding optional parameters to the conversion functions.