h2. Description

Event Level Agreement (ELA) extends and reuse Service Level Agreements (SLA) to express policies at the Event producers and consumers levels.

| 3 | Trust | Yes | The level of trust of an event source |


h2. WS-Agreement

The goal of this section is to show that the [WS-Agreement|wsstar:WS-Agreement] standard can be used without any extension to define ELA between event consumers and providers.
{code:title=ELA on frequency.xml|borderStyle=solid}
<?xml version="1.0" encoding="UTF-8"?>
<agreement xmlns:ns1="http://schemas.ggf.org/graap/2007/03/ws-agreement"
xmlns:ns2="http://docs.oasis-open.org/wsrf/bf-2" xmlns:ns3="http://www.w3.org/2005/08/addressing"
xmlns:ns4="http://upmc.fr/ns/ws-qml" xmlns:ns5="http://www.semeuse.org/monitoring"
xmlns:ns6="http://com.ebmwebsourcing.sla/agreementExtensions"
ns1:AgreementId="1">
<ns1:Name>FiremanELA</ns1:Name>
<ns1:Context>
<ns1:AgreementInitiator xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="ns3:EndpointReferenceType">
<ns3:Address>http://www.example.org/prefect/@PrefetEndpoint</ns3:Address>
</ns1:AgreementInitiator>
<ns1:AgreementResponder xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="ns3:EndpointReferenceType">
<ns3:Address>http://www.example.org/fireman/@FiremanEndpoint</ns3:Address>
</ns1:AgreementResponder>
<ns1:ExpirationTime>2009-10-09T15:10:10.250+02:00
</ns1:ExpirationTime>
<tns:alertDefinition name="alert0" id="alert0"
xmlns:tns="http://com.petalslink.common.alerting.definition/1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<tns:to name="to0.name" id="to0">
<tns:lastname>salatge</tns:lastname>
<tns:firstname>nicolas</tns:firstname>
<tns:partner>CLIENT</tns:partner>
<tns:protocol id="protocol0" name="soap-notification"
type="http://com.petalslink.common.alerting.definition.protocol/soap-notification/1.0">
<soap-notif:binding id="binding0"
xmlns:soap-notif="http://com.petalslink.common.alerting.definition.protocol/soap-notification/1.0"
xmlns:tns1="http://com.petalslink.common.alerting.definition/1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://com.petalslink.common.alerting.definition.protocol/soap-notification/1.0 ../../../../wscad-impl/src/main/resources/schema/wscad/extensions/protocols/soap-notification.xsd ">
<soap-notif:soap-address>http://localhost:9600/AlertService</soap-notif:soap-address>
</soap-notif:binding>
</tns:protocol>
<tns:format>CAP</tns:format>
</tns:to>
</tns:alertDefinition>
</ns1:Context>
<ns1:Terms>
<ns1:All>
<ns1:ServiceDescriptionTerm ns1:Name="term_1"
ns1:ServiceName="responderService" xmlns:ns3="http://www.w3.org/2005/08/addressing">
</ns1:ServiceDescriptionTerm>
<ns1:ServiceReference ns1:Name="term_1"
ns1:ServiceName="responderService" />
<ns1:ServiceProperties ns1:Name="term_1"
ns1:ServiceName="responderService">
<ns1:VariableSet>
<ns1:Variable ns1:Metric="http://wwww.w3.org/2007/ont/unit#s"
ns1:Name="frequency">
<ns1:Location xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="ns6:Location">
<ns4:QoS-dimension ontology=""
semantic-concept="http://www.nca.or.kr/2006/wsqdl/QualityFactor/MeasureFactor/frequency" />
</ns1:Location>
</ns1:Variable>
</ns1:VariableSet>
</ns1:ServiceProperties>
<ns1:GuaranteeTerm ns1:Name="FiremanGuarantee">
<ns1:ServiceScope ns1:ServiceName="Fireman">
topic:CardiacRyhtm
</ns1:ServiceScope>
<ns1:ServiceLevelObjective>
<ns1:KPITarget>
<ns1:KPIName>frequency</ns1:KPIName>
<ns1:CustomServiceLevel
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="frequency"
operator="&amp;lt;" xsi:type="ns4:ConstraintType">
<ns4:value floatValue="10">
<ns4:unit name="notification/minute" />
<ns4:type name="decimal"
semantic-concept="http://www.w3c.org/2001/XMLSchema:decimal" />
</ns4:value>
</ns1:CustomServiceLevel>
</ns1:KPITarget>
</ns1:ServiceLevelObjective>
</ns1:GuaranteeTerm>
</ns1:All>
</ns1:Terms>
</agreement>
{code}