Code example of embedding the GoodRelations vocabulary in a product offer page using RDFa

goodrelations-example.html

<div
  xmlns:gr="http://purl.org/goodrelations/v1#"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
  typeof="gr:Offering" about="#product_data">

 <span property="gr:name">Protective Sleeve for HyperPhone</span>
 <span rel="gr:hasPriceSpecification">
   <span typeof="gr:UnitPriceSpecification">
     Price: $<span property="gr:hasCurrencyValue" datatype="xsd:float">19.99</span>
     <span property="gr:hasCurrency" content="USD" datatype="xsd:string"></span>
   </span>
 </span>
   
 <span property="gr:description">Our protective HyperPhone sleeve not only protects your phone from scratches, but is also waterproof and will ensure your favorite phone will survive a one feet drop.</span>
 <span property="gr:hasStockKeepingUnit" content="123-456" datatype="xsd:string"></span>

 <span rel="gr:hasInventoryLevel">
   <span typeof="gr:QuantitativeValue">
     <span property="gr:hasValue" content="129" datatype="xsd:float">In-stock! Order now!</span>
   </span>
 </span>
 <div property="gr:hasEAN_UCC-13" content="01234567890128" datatype="xsd:string"></div>
 <div rev="gr:offers" resource="http://www.example.com/#company"></div>
 <div property="gr:includes">
   <div property="gr:ProductOrService">
     This sleeve only fits the <a property="gr:isAccessaryOrSparePartFor" href="http://www.phone.com/hyperphone/#product_data">HyperPhone</a> and is only available in <span property="gr:color" content="pink" datatype="xsd:string">pink</span>.
   </div>
 </div>
</div>