<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:tms="http://www.icisnet.gr/emcs/phase3/v2.00/tms" targetNamespace="http://www.icisnet.gr/emcs/phase3/v2.00/tms" 
  xmlns:emcs="http://www.icisnet.gr/emcs/phase3/v2.00/types" 
  elementFormDefault="qualified" attributeFormDefault="unqualified" version="1.00">
  
   <xs:import namespace="http://www.icisnet.gr/emcs/phase3/v2.00/types" schemaLocation="types.xsd" />
  
  <!--=========================================-->
  <!--      EMCS COMMON MESSAGE HEADER         -->
  <!--=========================================-->

  <xs:element name="Header" type="tms:HeaderType" />
  
  <xs:complexType name="HeaderType">
    <xs:sequence>
      <xs:element name="MessageSender" type="tms:MessageSenderType" />
      <xs:element name="MessageRecipient" type="tms:MessageRecipientType" />
      <xs:element name="DateOfPreparation" type="emcs:DateType" />
      <xs:element name="TimeOfPreparation" type="emcs:TimeType" />
      <xs:element name="MessageIdentifier" type="tms:MessageIdentifierType" />
      <xs:element name="CorrelationIdentifier" type="tms:CorrelationIdentifierType" minOccurs="0" />
      <xs:element name="MessageRole" type="tms:MessageRoleType" minOccurs="0" />
    </xs:sequence>
  </xs:complexType>
  
  <!-- 
  Examples: NDEA.DE | SEED.EC 
  Over CCN the sender and the recipient are always known.
  This element could be used for cross-checking
  -->
  <xs:simpleType name="MessageSenderType">
    <xs:restriction base="xs:token">
      <xs:maxLength value="36" />
    </xs:restriction>
  </xs:simpleType>

  <!-- 
  Examples: NDEA.FR | SEED.EC 
  Over CCN the sender and the recipient are always known.
  This element could be used for cross-checking
  -->
  <xs:simpleType name="MessageRecipientType">
    <xs:restriction base="xs:token">
      <xs:maxLength value="36" />
    </xs:restriction>
  </xs:simpleType>

  <!-- 
  Examples: uuid:d1681bbf-9de5-4d5f-afb7-b31a4e07529f 
  Each message (request, response, datagram) is associated with a unique ID
  The receiving application should consider messages with the same ID as duplicates.
  -->
  <xs:simpleType name="MessageIdentifierType">
    <xs:restriction base="xs:token">
      <xs:maxLength value="44" />
    </xs:restriction>
  </xs:simpleType>

  <!-- 
  Examples: uuid:07275b18-6940-49a3-85e6-975b24d99f4b 
  Not applicable/ignored for requests and datagram messages. 
  For the request-response message exchange pattern the receiving application
  copies the MessageIdentifier of the request to the CorrelationIdentifier
  of the response(s).
  -->
  <xs:simpleType name="CorrelationIdentifierType">
    <xs:restriction base="xs:token">
      <xs:maxLength value="44" />
    </xs:restriction>
  </xs:simpleType>

  <!-- 
  This field determines whether the message concerns the dispatch or the 
  destination roles. Not applicable/ignored for messages sent to ICISnet,
  otherwise required.
  -->
  <xs:simpleType name="MessageRoleType">
    <xs:restriction base="xs:token">
      <xs:enumeration value="1">
        <xs:annotation>
          <xs:documentation>Message concerns the dispatch role</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="2">
        <xs:annotation>
          <xs:documentation>Message concerns the destination role</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>

</xs:schema>
