默认情况下，WordPress的（可视化）编辑器TinyMCE会剥离schema microdata 来自输入。有插件(example) 这将阻止这种行为。或者您也可以通过将此片段添加到functions.php (docs):

function wpse238918_allow_schema ($in) {
    if(!empty($in[\'extended_valid_elements\']))
        $in[\'extended_valid_elements\'] .= \',\';
    $in[\'extended_valid_elements\'] .= \'@[id|class|style|title|itemscope|itemtype|itemprop|datetime|rel],div,dl,ul,dt,dd,li,span,a|rev|charset|href|lang|tabindex|accesskey|type|name|href|target|title|class|onfocus|onblur]\';
    return $in;
    }
add_filter(\'tiny_mce_before_init\', \'wpse238918_allow_schema\' );