A QUICK WORD ABOUT NOMENCLATURE Since this report references both itself and the 21.1 standard, the following nomenclature has been adopted to make it clear which document is being referenced. report – references this document, the one you are now reading. standard references the 21.1 standard, unless otherwise noted. section and subsection both refer to portions of the API 21.1 standard. document is a generic term that could be referencing either document. Hopefully the context will make it clear which document is being referenced