RDFa or Resource Description Framework in Attributes is a W3C Recommendation that adds a set of attribute-level extensions to HTML, XHTML and various XML-based document types for embedding rich metadata within Web documents. The Resource Description Framework (RDF) data-model mapping enables its use for embedding RDF subject-predicate-object expressions within XHTML documents. It also enables the extraction of RDF model triples by compliant user agents.
Reference:
https://en.wikipedia.org/wiki/RDFa
Example:
<div typeof='LocalBusiness' vocab='https://schema.org/'>
<h1><span
property='name'>Irudini</span></h1>
<span
property='description'>Menjual berbagai Buket Bunga, Boneka, Snack, Uang,
dan Jasa Dekorasi Photobooth, Bridal Shower, Ulang Tahun, Pernikahan, dan
acara pesta lainnya.</span>
<div
property='address' typeof='PostalAddress'>
<span property='streetAddress'>Total Persada Jl. Jambi Blok C1 No.10
RT:001 RW:007 Kel.Gembor Kec.Periuk</span>
<span property='addressLocality'>Kota Tangerang</span>
<span property='addressRegion'>Banten</span>
<span property='postalCode'>15133</span>
</div>
<span property='telephone'>+62
821-1175-6023</span>
<a property='url'
href='https://www.irudini.com'>www.irudini.com</a>
<time
property='openingHours' datetime='Mo-Su 8:00-22:00'>Every Day
8am-10pm</time>
</div>
