<xs:schema xmlns="http://www.rixg.org.uk/" xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.rixg.org.uk/">
    <xs:include schemaLocation="../Types/Clinician.xsd"/>
    <xs:include schemaLocation="../Types/CommonMetadata.xsd"/>
    <xs:include schemaLocation="../Types/Location.xsd"/>

    <xs:complexType name="Observations">
        <xs:sequence>
            <xs:element name="Observation" type="Observation" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:attribute name="start" type="xs:date"/>
        <xs:attribute name="stop" type="xs:date"/>
    </xs:complexType>

    <xs:complexType name="Observation">
        <xs:sequence>
            <xs:element name="ObservationTime" type="xs:dateTime">
                <xs:annotation>
                    <xs:appinfo>observation.observationtime</xs:appinfo>
                    <xs:documentation>When the Observation was made</xs:documentation>
                </xs:annotation>
            </xs:element>
            <xs:element name="ObservationCode">
                <xs:annotation>
                    <xs:documentation>Code for the Observation - UKRR, PV or SNOMED Coding Standards.</xs:documentation>
                </xs:annotation>
                <xs:complexType>
                    <xs:sequence>
                        <xs:element name="CodingStandard" minOccurs="0">
                            <xs:annotation>
                                <xs:appinfo>observation.observationcodestd</xs:appinfo>
                                <xs:documentation/>
                            </xs:annotation>
                            <xs:simpleType>
                                <xs:restriction base="xs:string">
                                    <xs:maxLength value="100"/>
                                </xs:restriction>
                            </xs:simpleType>
                        </xs:element>
                        <xs:element name="Code" minOccurs="0">
                            <xs:annotation>
                                <xs:appinfo>observation.observationcode</xs:appinfo>
                                <xs:documentation/>
                            </xs:annotation>
                            <xs:simpleType>
                                <xs:restriction base="xs:string">
                                    <xs:maxLength value="100"/>
                                </xs:restriction>
                            </xs:simpleType>
                        </xs:element>
                        <xs:element name="Description" minOccurs="0">
                            <xs:annotation>
                                <xs:appinfo>observation.observationdesc</xs:appinfo>
                                <xs:documentation/>
                            </xs:annotation>
                            <xs:simpleType>
                                <xs:restriction base="xs:string">
                                    <xs:maxLength value="100"/>
                                </xs:restriction>
                            </xs:simpleType>
                        </xs:element>
                    </xs:sequence>
                </xs:complexType>
            </xs:element>
            <xs:element name="ObservationValue" minOccurs="0">
                <xs:annotation>
                    <xs:appinfo>observation.observationvalue</xs:appinfo>
                    <xs:documentation/>
                </xs:annotation>
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:maxLength value="20"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:element name="ObservationUnits" minOccurs="0">
                <xs:annotation>
                    <xs:appinfo>observation.observationunits</xs:appinfo>
                    <xs:documentation/>
                </xs:annotation>
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:maxLength value="30"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:element name="PrePost" minOccurs="0">
                <xs:annotation>
                    <xs:appinfo>observation.prepost</xs:appinfo>
                    <xs:documentation>Was the Observation made PRE or POST dialysis</xs:documentation>
                </xs:annotation>
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:enumeration value="PRE">
                            <xs:annotation>
                                <xs:documentation>Pre-Dialysis</xs:documentation>
                            </xs:annotation>
                        </xs:enumeration>
                        <xs:enumeration value="POST">
                            <xs:annotation>
                                <xs:documentation>Post-Dialysis</xs:documentation>
                            </xs:annotation>
                        </xs:enumeration>
                        <xs:enumeration value="UNK">
                            <xs:annotation>
                                <xs:documentation>Unknown</xs:documentation>
                            </xs:annotation>
                        </xs:enumeration>
                        <xs:enumeration value="NA">
                            <xs:annotation>
                                <xs:documentation>Not Applicable</xs:documentation>
                            </xs:annotation>
                        </xs:enumeration>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:element name="Comments" minOccurs="0">
                <xs:annotation>
                    <xs:appinfo>observation.commenttext</xs:appinfo>
                    <xs:documentation/>
                </xs:annotation>
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:maxLength value="1000"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:element name="Clinician" type="Clinician" minOccurs="0">
                <xs:annotation>
                    <xs:documentation>Requesting Physician as a nationally coded person. Use the description if this is not coded.</xs:documentation>
                </xs:annotation>
            </xs:element>
            <xs:element name="EnteredAt" type="Location" minOccurs="0">
                <xs:annotation>
                    <xs:documentation/>
                </xs:annotation>
            </xs:element>
            <xs:element name="EnteringOrganization" type="Location" minOccurs="0">
                <xs:annotation>
                    <xs:documentation/>
                </xs:annotation>
            </xs:element>
            <xs:group ref="CommonMetadata"/>
        </xs:sequence>
    </xs:complexType>
</xs:schema>