本研究使用Web Services建構以臨床文件架構(Clinical Document Architecture, CDA)為標準的電子病歷交換系統。CDA文件提供了標準化醫療文件，並在醫療院所之間進行病歷交換，它使用XML清楚地定義了完整的醫療物件包含了文字、影像、聲音、以及其它多媒體的醫療紀錄資訊。本研究透過分散式物件的技術，使得電子病歷交換具有較高的延展力；導入Web Services的技術可使HTTP通訊協定於分散式架構中更具效能，改善既有醫療資訊環境封閉性架構的限制與缺點。

In this paper, we develop an electronic health record (EHR) exchange system based on HL7/CDA standard by using web services. The clinical document architecture(CDA) provides a medical document standard which be used for medical information exchange. The CDA adopts XML to clearly define complete medical objects which include texts, images, voices and other multimedia medical record information. In this research, we leverage the technology of distributed object to make EHR exchange system more general and extensive. We also introduce the technology of web services to make HTTP protocol more efficient in a distributed environment and improve the restriction and defect of current closed medical information system.