Ada Programming/Libraries/Ada.Strings.Unbounded.Equal Case Insensitive

is a unit of the Predefined Language Environment since Ada 2012.

Specification
AdaStringsUnboundedEqual_Case_Insensitive Left Right Unbounded_String  Boolean PreelaborateAdaStringsUnboundedEqual_Case_Insensitive

Wikibook

 * Ada Programming/Libraries/Ada
 * Ada Programming/Libraries/Ada.Strings
 * Ada Programming/Libraries/Ada.Strings.Unbounded