-- XSD schema extracted from ITU-T H.761 (06/2011)

<!--
XML Schema for the NCL modules

This is NCL
Copyright: 2000-2006 PUC-RIO/LABORATORIO TELEMIDIA, All Rights Reserved.
See http://www.telemidia.puc-rio.br

Public URI: http://www.ncl.org.br/NCL3.0/modules/NCL30ConnectorCausalExpression.xsd
Author: TeleMidia Laboratory
Revision: 19/09/2006

Schema for the NCL Connector Causal Expression module namespace.
-->
<schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:connectorCausalExpression="http://www.ncl.org.br/NCL3.0/ConnectorCausalExpression"
    xmlns:connectorCommonPart="http://www.ncl.org.br/NCL3.0/ConnectorCommonPart"
  targetNamespace="http://www.ncl.org.br/NCL3.0/ConnectorCausalExpression"
  elementFormDefault="qualified" attributeFormDefault="unqualified" >

<!-- import the definitions in the modules namespaces -->
<import namespace="http://www.ncl.org.br/NCL3.0/ConnectorCommonPart" 
    schemaLocation="http://www.ncl.org.br/NCL3.0/modules/NCL30ConnectorCommonPart.xsd"/>

<simpleType name="conditionRoleUnion">
  <union memberTypes="string connectorCausalExpression:conditionRolePrototype"/>
</simpleType>

<simpleType name="conditionRolePrototype">
  <restriction base="string">
    <enumeration value="onBegin" />
    <enumeration value="onEnd" />
    <enumeration value="onPause" />
    <enumeration value="onResume" />
    <enumeration value="onAbort" />
  </restriction>
</simpleType>

<simpleType name="maxUnion">
  <union memberTypes="positiveInteger connectorCausalExpression:unboundedString"/>
</simpleType>

<simpleType name="unboundedString">
  <restriction base="string">
    <pattern value="unbounded"/>
  </restriction>
</simpleType>

<complexType name="simpleConditionPrototype">
  <attribute name="role" type="connectorCausalExpression:conditionRoleUnion" use="required"/>
  <attribute name="eventType" type="connectorCommonPart:eventPrototype" use="optional"/>
  <attribute name="key" type="string" use="optional"/>
  <attribute name="transition" type="connectorCommonPart:transitionPrototype" use="optional"/>
  <attribute name="delay" type="string" use="optional"/>
  <attribute name="min" type="positiveInteger" use="optional"/>
  <attribute name="max" type="connectorCausalExpression:maxUnion" use="optional"/>
  <attribute name="qualifier" type="connectorCommonPart:logicalOperatorPrototype" use="optional"/>
</complexType>

<complexType name="compoundConditionPrototype">
  <attribute name="operator" type="connectorCommonPart:logicalOperatorPrototype" use="required"/>
  <attribute name="delay" type="string" use="optional"/>
</complexType>

<simpleType name="actionRoleUnion">
  <union memberTypes="string connectorCausalExpression:actionNamePrototype"/>
</simpleType>

<simpleType name="actionNamePrototype">
  <restriction base="string">
    <enumeration value="start" />
    <enumeration value="stop" />
    <enumeration value="pause" />
    <enumeration value="resume" />
    <enumeration value="abort" />
    <enumeration value="set" />
  </restriction>
</simpleType>

<simpleType name="actionOperatorPrototype">
  <restriction base="string">
    <enumeration value="par" />
    <enumeration value="seq" />
  </restriction>
</simpleType>

<complexType name="simpleActionPrototype">
  <attribute name="role" type="connectorCausalExpression:actionRoleUnion" use="required"/>
  <attribute name="eventType" type="connectorCommonPart:eventPrototype" use="optional"/>
  <attribute name="actionType" type="connectorCausalExpression:actionNamePrototype" use="optional"/>
  <attribute name="delay" type="string" use="optional"/>
  <attribute name="value" type="string" use="optional"/>
  <attribute name="repeat" type="positiveInteger" use="optional"/>
  <attribute name="repeatDelay" type="string" use="optional"/>
  <attribute name="min" type="positiveInteger" use="optional"/>
  <attribute name="max" type="connectorCausalExpression:maxUnion" use="optional"/>
  <attribute name="qualifier" type="connectorCausalExpression:actionOperatorPrototype" use="optional"/>
</complexType>

<complexType name="compoundActionPrototype">
  <choice minOccurs="2" maxOccurs="unbounded">
    <element ref="connectorCausalExpression:simpleAction" />
    <element ref="connectorCausalExpression:compoundAction" />
  </choice>
  <attribute name="operator" type="connectorCausalExpression:actionOperatorPrototype" use="required"/>
  <attribute name="delay" type="string" use="optional"/>
</complexType>

  <!-- declare global elements in this module -->
<element name="simpleCondition" type="connectorCausalExpression:simpleConditionPrototype" />
<element name="compoundCondition" type="connectorCausalExpression:compoundConditionPrototype" />
<element name="simpleAction" type="connectorCausalExpression:simpleActionPrototype" />
<element name="compoundAction" type="connectorCausalExpression:compoundActionPrototype" />

</schema>