TYPO3 Rootline Menu / Breadcrumb with RDFa metadata

Lib.breadcrumb.t3s

/**
 * TYPO3 Rootline menu with RDFa metadata 
 *
 * @author Oliver Thiele
 * @see https://developers.google.com/structured-data/breadcrumbs
 */
lib {
	breadcrumb = HMENU
	breadcrumb {
		special = rootline
		special.range = 0|-1
		1 = TMENU
		1 {
			wrap = <ol class="breadcrumb" vocab="http://schema.org/" typeof="BreadcrumbList">|</ol>
			NO = 1
			NO {
				before.cObject = LOAD_REGISTER
				before.cObject {
					tempN.data = register:L1N
					tempN.wrap = |+1
					L1N.data = register:tempN
					L1N.prioriCalc = 1
				}
				wrapItemAndSub = <li property="itemListElement" typeof="ListItem">|</li>
				stdWrap.wrap = <span property="name">|</span>
				linkWrap = |<meta property="position" content="{register:L1N}">
				ATagParams = property="item" typeof="WebPage"
				stdWrap.htmlSpecialChars = 1
				allStdWrap.insertData = 1
			}
			CUR < .NO
			CUR {
				wrapItemAndSub = <li class="active" property="itemListElement" typeof="ListItem">|</li>
				doNotLinkIt = 1
			}
		}
	}
}