exception on new element based on supertype: TYPO3.Neos:Content

ArticleMetaData.html

{namespace neos=TYPO3\Neos\ViewHelpers}
<neos:contentElement node="{node}">
  <neos:contentElement.editable property="title">{title -> f:format.raw()}</neos:contentElement.editable>
</neos:contentElement>

exception.log

Exception while rendering
page<TYPO3.Neos:Page>/body<TYPO3.Neos:Template>/content/intro<TYPO3.Neos:ContentCollection>/default<TYPO3.TypoScript:Matcher>/element<TYPO3.Neos:ContentCollection.Default>/itemRenderer<TYPO3.Neos:ContentCase>/default<TYPO3.TypoScript:Matcher>/element<BLEICKER.Commerce:ArticleMetaData>:
The TypoScript object at path "page/body/content/intro/default/element/itemRenderer/default/element" could not be rendered: Missing implementation class name for "BLEICKER.Commerce:ArticleMetaData". Add @class in your TypoScript configuration. (20130724170154fef536)

NodeTypes.yaml

'BLEICKER.Commerce:ArticleMetaData':
  superTypes: ['TYPO3.Neos:Content']
  ui:
    label: 'Article Meta Data'
    icon: 'icon-file-text'
  properties:
    title:
      type: string
      defaultValue: '<h1>Enter Article Title Here</h1>'
      ui:
        inlineEditable: TRUE

Root.ts2

# Article Meta Data TS Object
prototype(BLEICKER.Commerce:ArticleMetaData) < prototype(TYPO3.Neos:Template)
prototype(BLEICKER.Commerce:ArticleMetaData) {
  templatePath = 'resource://BLEICKER.CommerceAdmin/Private/Templates/TypoScriptObjects/ArticleMetaData.html'
	title = ${q(node).property('title')}
}