ray;text-decoration:line-through"><p>May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.</p>
</div></td></tr><tr><td style="white-space: nowrap">Short</td><td>Extension<span style="