Reltio supports two primary attribute ordering strategies: Last Update Date (LUD) and FieldBased. The LUD strategy orders attribute values based on their most recent update date, while the FieldBased strategy allows sorting complex attributes like nested or reference attributes based on a specific field within them.

1) LUD [Last Update Date strategy ] -  The most recently updated attribute values will have the highest sort priority. By default, all attribute values are ordered by this strategy. The value with the maximum update date comes first.

{
 "uri":"configuration/entityTypes/Individual/attributes/FirstName",
 "name":"FirstName",
 "label":"First Name",
 "attributeOrdering": {
 "orderingStrategy": "LUD"
 },
 "type":"String"
 }

2) FieldBased strategy - Used Only for complex attributes like nested or reference. This ordering strategy defines that complex attribute values should be sorted in accordance with some attribute value inside these attributes. For example, for the nested attribute Education, we can use order based on the YearOfGraduation value.

{
 ​"uri":"configuration/entityTypes/Individual/attributes/Education",
 ​"name":"Education",
 ​"label":"Education",
 ​"type":"Nested",
 ​"attributeOrdering": {
 ​"orderingStrategy": "FieldBased",
 ​"fieldURI": "configuration/entityTypes/Individual/attributes/Education/attributes/YearOfGraduation"
 ​}
}