The quality of two or more entities having no detectable variation in all measurable characteristics.
From Namespaces in XML 1.1 ( 2004-02-04) The two IRIs are treated as strings, and they are identical if and only if the strings are identical, that is, if they are the same sequence of characters.
the same, exactly alike. Latin abbreviation
items: Items that are the same in every respect whatsoever. The tables of two identical items are indistinguishable. Contrast with duplicate items.