Oracle Fuion Lookup TAG

What is  the user of TAG in Oracle Fusion?

Lookup Type	Lookup Code	Meaning	Tag
MAR_STATUS	M	Married
	S	Single
	R	Registered Partner	+NL
	DP	Domestic Partner	-FR, AU

In this case, tags are used for localizing the codes. All legislations  list Married and Single. Only the Dutch legislation lists Registered Partner. And all legislations except France and Australia also list Domestic Partner