EventData messages overview

EC can act as a subscriber application and will receive EventData messages through the MECEventHubSubscriber channel.

The EventData message will be in an XML format using this schema:

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:jxb="http://java.sun.com/xml/ns/jaxb" jxb:version="2.0">
	<xsd:element name="EventData" type="EventDataType"/>
	<xsd:complexType name="EventDataType">
		<xsd:sequence>
			<xsd:element ref="Publisher"/>
			<xsd:element ref="DocumentName"/>
			<xsd:element ref="Operation"/>
			<xsd:element ref="TrackingId"/>
			<xsd:element ref="SentTimestamp"/>

			<xsd:element name="Document" type="DocumentType"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="DocumentType">
		<xsd:sequence>
			<xsd:element name="ElementData" type="ElementDataType" minOccurs="0" maxOccurs="unbounded"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="ElementDataType">

		<xsd:sequence>
			<xsd:element ref="Name"/>
			<xsd:element ref="Value" minOccurs="0"/>
			<xsd:element ref="OldValue" minOccurs="0"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:element name="Publisher" type="xsd:string"/>
	<xsd:element name="DocumentName" type="xsd:string"/>
	<xsd:element name="Operation" type="xsd:string"/>

	<xsd:element name="TrackingId" type="UUID"/>
	<xsd:element name="SentTimestamp" type="xsd:dateTime"/>
	<xsd:element name="Name" type="xsd:string"/>
	<xsd:element name="Value" type="xsd:string"/>
	<xsd:element name="OldValue" type="xsd:string"/>
	<xsd:simpleType name="UUID">
		<xsd:restriction base="xsd:string">
			<xsd:pattern value="[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}"/>
		</xsd:restriction>

	</xsd:simpleType>
</xsd:schema>

Notice that you will have a problem distinguishing the value from the ElementData element because the node/element is unbounded, for example, /EventData/Document/ElementData/Name.

For EC to be able to differentiate or detect elements on their ordered sequence, specify the two XPath predicates below as XML targets. Predicates are used to find a specific node or a node that contains a specific value. Predicates are always embedded in square brackets.

This table shows a list of path expressions with predicates, and corresponding result. This applies only to XPath options of all XML targets.