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They just allow a program to verify that XML strings conform to some set of rules . The 2003 strategy reports progress toward meeting the President 's goals of reducing drug use by 10 percent over two years , and 25 percent over five years , highlighted by reductions in drug use among young people for the first time in nearly a decade . In these instances , XML provides a mechanism for multiple companies to exchange data according to an agreed upon set of rules . This proposed rule would affect the regulations set forth at 42 CFR part 405 , which consists of regulations on Federal health insurance for the aged and disabled ; part 410 , which consists of regulations on supplementary medical insurance benefits ; part 414 , which consists of regulations on the payment for Part B medical and other health services ; part 415 , which pertains to services furnished by physicians in providers , supervising physicians in teaching settings , and residents in certain settings ; part 424 , which pertains to the conditions for Medicare payment ; and part 485 , which pertains to conditions of participation : specialized providers . Thiemann and six coauthors found that transplants are a third more expensive for so-called Status 1 patients , who await transplants in intensive care units than for other patients .