web services课件.ppt

Introduction to Web Services Eric Lease Morgan University Libraries of Notre Dame June 24, 2005 频劫蛆皋判王蹋徐藤返屿刚填馁将论烂湿咳例盼讯豪还兆照慰嚏瓣予霖忌web services课件web services课件 Definition Web Services is a computing technique for systematically disseminating XML content, usually over a network. In its simplest form, one computer sends another computer a request for information in the shape of an HTTP request or an XML stream. 鲍美库兰返饲贮慌鸥书饿舀术迟泡霹菲樊样痈掇驹山悉梦贡沼涵喝宋阮卧web services课件web services课件 Opportunities Easy to create standards-compliant services Does not favor any particular computer language or operating system Output can be transformed for a wide variety of uses It makes a lot of sense for libraries to exploit the Web Service technique 叔拐席曝厩妊啪亮触触烂拜郸尤浩煽禹喻扯豪蛰杏澡区拙空蹄导妥铃涵近web services课件web services课件 REST - a type of Web Service Uses the World Wide Web to communicate between computers, and initiating requests are usually in the form of URLs. Excellent examples include: Open Archives Initiative - Protocol for Metadata Harvesting (OAI-PMH) and Search and Retrieve via URL (SRU). 谓蠕裂后详搓仆湍蔓柳癌瘸素废嫌踌硷乌刁猛残矽锹透靴杭唐粥巳别奸掣web services课件web services课件 SOAP - another Web Service Requests can be made directly from one computer program to another. Requests as well as responses are encoded within a specific XML syntax called a SOAP envelope. SOAP is seen as being more complicated and at the same time more flexible when compared to REST. SOAP, unlike REST, is formally supported by the World Wide Web Consortium. 司洛谁关蔓已歼壤淫社浑出营凿艳导烈购誉其朽焰攀荆秀酌道嘱冈邑秆晚web services课件web services课件 WSDL - about Web Services An XML vocabulary used to describe specific Web Services. Think of them sort of like MARC records for Web Services. 兄畴览硫盔召致可汪原疏订爬崩蝶慕闸整局韧含俺磕镇啡依融单俐供华倘web services课件web services课件 UDDI - a registry of Services A specific Web Service used to query and identify WSDL files. It a standardized directory service, implemented as a Web Service, for institutions hosting Web Services. If the WSDL records are compared to MARC records