DataTopic ItemKeyInfo

Questions/design actions:

How to model that 1 ItemMessage (one header) can have a one or more items.

STATUS CONCEPT

<Material xmlns="https://imde.io/schema/material">
 <Items>
  <Item>
    <ItemKeyInfo
     <Identifiers>
       <Identifier Type=UMID "e2749359-c3cf-4504-9084-9239a1848aed">
       <Identifier Type= GTIN "1234567102979"
       <Identifier Type = DataSenderID  "34534"
      </Identifiers>
    <ItemName
       <name culture nl-Nl ....
    <Class>
       <Class Type =ETIM "EC83498>
       <Class Type= GPC 101215
       <Class Name
            <Translation Culture=en "Screwdriver"
     <Brand 
         <IDentifier Type=GBIN 4687543219
         <BrandName = 
     <ItemMasterCode
     <ItemMasterName
         <Name Culture

Supported classififcations

GPC (GS1-GDSN)
ETIM