channel 

A transmission channel used by the message

Element Information

Model

Attributes

QName Type Fixed Default Use Inheritable Annotation
creator QCodeType optional 
If the attribute is empty, specifies which entity (person, organisation or system) will edit the property - expressed by a QCode. If the attribute is non-empty, specifies which entity (person, organisation or system) has edited the property.
creatoruri IRIType optional 
If the attribute is empty, specifies which entity (person, organisation or system) will edit the property - expressed by a URI. If the attribute is non-empty, specifies which entity (person, organisation or system) has edited the property.
custom xs:boolean optional 
If set to true the corresponding property was added to the G2 Item for a specific customer or group of customers only. The default value of this property is false which applies when this attribute is not used with the property.
g2flag xs:string NMSG optional 
DO NOT USE this attribute, for G2 internal maintenance purposes only.
how QCodeType optional 
Indicates by which means the value was extracted from the content - expressed by a QCode
howuri IRIType optional 
Indicates by which means the value was extracted from the content - expressed by a URI
id xs:ID optional 
The local identifier of the property.
literal g2normalizedString optional 
A free-text value assigned as a property
value.
modified DateOptTimeType optional 
The date (and, optionally, the time) when the property was last modified. The initial value is the date (and, optionally, the time) of creation of the property.
pubconstraint QCodeListType optional 
One or many constraints that apply to publishing the value of the property - expressed by a QCode. Each constraint applies to all descendant elements.
pubconstrainturi IRIListType optional 
One or many constraints that apply to publishing the value of the property - expressed by a URI. Each constraint applies to all descendant elements.
qcode QCodeType optional 
A qualified code assigned as a property value.
role QCodeType optional 
A refinement of the semantics of the property - expressed by a QCode
roleuri IRIType optional 
A refinement of the semantics of the property - expressed by a URI
type QCodeType optional 
The type of the concept assigned as a controlled or an uncontrolled property value - expressed by a QCode
typeuri IRIType optional 
The type of the concept assigned as a controlled or an uncontrolled property value - expressed by a URI
uri IRIType optional 
A URI which identifies a concept.
why QCodeType optional 
Why the metadata has been included - expressed by a QCode
whyuri IRIType optional 
Why the metadata has been included - expressed by a URI
Wildcard: ANY attribute from ANY namespace OTHER than 'http://iptc.org/std/nar/2006-10-01/'

Source 

<xs:element name="channel">
  <xs:annotation>
    <xs:documentation>A transmission channel used by the message</xs:documentation>
  </xs:annotation>
  <xs:complexType>
    <xs:complexContent>
      <xs:extension base="StringType">
        <xs:attributeGroup ref="qualifyingAttributes"/>
        <xs:attribute name="g2flag" type="xs:string" use="optional" fixed="NMSG">
          <xs:annotation>
            <xs:documentation>DO NOT USE this attribute, for G2 internal maintenance purposes only.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:element>

Sample