make_call.xsd

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

	<xs:include schemaLocation="error.xsd"/>

	<xs:complexType name="MakeCall">
		<xs:attribute name="number" use="required"/>
		<xs:attribute name="workitem_id" use="optional"/>
	</xs:complexType>

	<!-- in -->
	<xs:element name="in">
		<xs:complexType>
			<xs:all>
				<xs:element name="request">
					<xs:complexType>
						<xs:sequence>
							<xs:element name="make_call" type="MakeCall"/>
						</xs:sequence>
					</xs:complexType>
				</xs:element>
			</xs:all>
		</xs:complexType>
	</xs:element>
	<!-- out -->
	<xs:element name="out">
		<xs:complexType>
			<xs:choice>
				<xs:element name="response">
					<xs:complexType>
						<xs:sequence>
							<xs:element name="ok">
								<xs:complexType>
									<xs:attribute name="internal_call_id" type="xs:string"/>
								</xs:complexType>
							</xs:element>
						</xs:sequence>
					</xs:complexType>
				</xs:element>
				<xs:element name="error" type="errorType"/>
			</xs:choice>
		</xs:complexType>
	</xs:element>
</xs:schema>