A 3 letter currency identifier as defined in ISO 4217 (seeĀ https://en.wikipedia.org/wiki/ISO_4217).
PresentationML
<div class="PresentationML" data-version-id="2.0"> <div class="entity" data-entity-id="gbp"> <b>UK Pounds Sterling</b> </div> </div>
EntityJSON
{ "gbp": { "type": "org.symphonyoss.fin.ccy.id.iso4217", "value": "GBP" } }