ive</a></td></tr></table>

<h2>Transforms between R4 and R5</h2>

<p>
In addition to a <a href="diff.html">list of all differences between R4 and R5</a>,
this specification also provides transforms between R4 and R5 for most resources
that were in R4 or R4B. These transforms are expressed using the 
<a href="mapping-language.html">FHIR Mapping Language</a>, and both serve as
formal documentation of the relationship between the resource structures in R4 and R5, 
and can also be used to convert betw