This case-sensitive code system https://standards.digital.health.nz/ns/alias-type-code defines the following codes:

Code	Display	Definition
aka	Aka	The name by which the organisation or facility is also known as.
old	Old	The previous legal name(s) of the organisation/facility.
maori	Māori	The Māori name of the organisation or facility.
legal	Legal	The name as recorded in the official register eg Register of Companies.
short	Short	An abbreviated name by which the organisation or facility is known.
trade-as	Trading as	Used when the organisation/facility has a separate trading name.
current	Current unverified or unofficial name	The name currently used for a facility.