          <td class="prop-ect">



                Text


          </td>
          <td class="prop-desc">The product identifier, such as ISBN. For example: <code>&lt;meta itemprop='productID' content='isbn:123-456-789'/&gt;</code>.</td>
        </tr>

        <tr><th class="prop-nam" scope="row">
          <code>releaseDate</code></th>
          <td class="prop-ect">



                Date


          </td>
          <td class="prop-desc">The release date of a product or product model. This can be used to