CaseIgnoreIA5Match requires LDAP Internationalized String Preparation for the Assertion Value and Attribute Value.
The rule evaluates to TRUE if and only if the prepared attribute value character string and the prepared assertion value character string have the same number of characters and corresponding characters have the same code point.
In preparing the attribute value and assertion value for comparison, characters are case folded in the Map preparation step, and only Insignificant Space Handling is applied in the Insignificant Character Handling step.