The EMR environment is a complex and sophisticated environment (see Figure 2). Its foundation is the clinical data repository (CDR), a real-time transaction processing database of patient clinical information for practitioners.

• EMR是一个复杂的多变的环境（看图2），它建立在一个临床数据仓库（CDR）上，是一个为从业者服务的患者临床信息的实时事务处理数据库。