ThisisapreliminarydocumentforanAPIortechnologyin development.Althoughthisdocumenthasbeenreviewedfortechnicalaccuracy, it is notfinal. Appleis supplyingthisinformationtohelpyouplanfortheadoptionofthetechnologiesandprogramminginterfacesdescribedherein.Thisinformationissubjecttochange, andsoftwareim