ぱんくずリスト（JSON-LD + WAI-ARIA）

sample_breadcrumb.html

<nav aria-label="Breadcrumb" class="breadcrumb">
  <h2>パンくずリスト</h2>
  <ol>
    <li><a href="/">Top page</a></li>
    <li aria-current="page">PAGE 1</li>
  </ol>
</nav>
<script type="application/ld+json">
  {
    "@context": "http://schema.org",
    "@type": "BreadcrumbList",
    "itemListElement": [
    {
      "@type": "ListItem",
      "position": 1,
      "item":{
        "@id": "https://exsample.com/",
        "name": "Top page"
      }
    },
    {
      "@type": "ListItem",
      "position": 2,
      "item":{
        "@id": "https://exsample.com/page1/",
        "name": "PAGE 1"
      }
    }]
  }
</script>