http://hl7.org/fhir/StructureDefinition/iso21090-ADXP-delimiter|4.0.1

Delimiters are printed without framing white space. If no value component is provided, the delimiter appears as a line break.

element_id	types
Extension
Extension.extension
Extension.url
Extension.value[x]	string
Extension
Extension.id	http://hl7.org/fhirpath/System.String
Extension.extension	Extension
Extension.url	http://hl7.org/fhirpath/System.String
Extension.value[x]	string