An example template for a Service review marked-up with microdata using the http://schema.org vocabularies

service_review_template.html

<div class="panelTab">Business / Service</div>
<div class="panel">
  {% if page.categories contains "restaurant" %}
    <div itemscope itemtype="http://schema.org/Restaurant" itemref="reviews">
  {% elsif page.categories contains "hotel" %}
    <div itemscope itemtype="http://schema.org/Hotel" itemref="reviews">
  {% else %}
    <div itemscope itemtype="http://schema.org/Organization" itemref="reviews">
  {% endif %}

  <ul class="reviews">
    <li id="businessName" itemprop="name">{{ page.business-name }}</li>
    <li itemprop="aggregateRating" itemscope itemtype="http://schema.org/AggregateRating">
      {{ page.avg-rating|star_rating }}
      {% if page.display-map %}
        &nbsp;
      {% else %}
        <br />
      {% endif %}
      <span itemprop="ratingValue" style="display:none">{{ page.avg-rating }}</span>
      <span itemprop="reviewCount">{{ page.num-reviews }}</span>
      {% if page.num-reviews == 1 %}
        Review
      {% else %}
        Reviews
      {% endif %}
    </li>
    <span itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
      {% if page.address-po-box %}
        <li id="address-po-box" itemprop="postOfficeBoxNumber">{{ page.address-po-box }}</li>
      {% endif %}
      {% if page.street-address %}
        <li id="street-address" itemprop="streetAddress">{{ page.street-address }}</li>
      {% endif %}
      {% if page.address-locality %}
        <li id="address-locality" itemprop="addressLocality">{{ page.address-locality }}</li>
      {% endif %}
      {% if page.address-region %}
        <li id="address-region" itemprop="addressRegion">{{ page.address-region }}</li>
      {% endif %}
      {% if page.address %}
        <li id="address" itemprop="streetAddress">{{ page.address | replace: ',', '<br />'}}</li>
      {% endif %}
      <li id="postal-code" itemprop="postalCode">{{ page.postal-code | upcase}}</li>
      {% if page.country %}
        {% comment %}Need to create a filter to turn a country name into a ISO 3166-1 alpha-2 country code{% endcomment %}
        <li id="country" itemprop="addressCountry">{{ page.country}}</li>
      {% endif %}
    </span>
    {% if page.tel-number %}
      <li id="tel-number">Tel: <span itemprop="telephone">{{ page.tel-number }}</span></li>
    {% endif %}
    {% if page.website %}
      <li id="website"><a itemprop="url" href="http://{{ page.website }}">{{ page.website|truncate: 30 }}</a></li>
    {% endif %}
  </ul>
</div>

<div class="panelTab">Reviews</div>
<div class="panel" id="reviews">
  {% for review in page.reviews reversed %}
    <div itemprop="reviews" itemscope itemtype="http://schema.org/Review">
      <span class="review-date">
        <time itemprop="datePublished" datetime="{{review.date|iso8601}}">
          {{ review.date }}
        </time>
      </span>
      <span itemprop="reviewRating" itemscope itemtype="http://schema.org/Rating">
        <meta itemprop="ratingValue" content="{{review.rating}}" />
        {{ review.rating|star_rating }}
      </span>
      <span itemprop="author" itemscope itemtype="http://schema.org/Person">
        {% if review.reviewer-url %}
          <a class="reviewer" href="http://{{ review.reviewer-url }}" itemprop="url">
            <span itemprop="name">{{ review.reviewer }}</span>
          </a>
        {% else %}
          <span class="reviewer" itemprop="name">{{ review.reviewer }}</span>
        {% endif %}
      </span>
      <div class="comment">
        <span itemprop="reviewBody">
          {{ review.comment |newline_to_br }}<br />
        </span>
      </div>
    </div>
  {% endfor %}
</div>