资料与显示分开.ppt

XML(eXtensibleMarkupLanguage)DBniky10/29/woexamplesHistoryLogicalandPhysicalStructureElement(logicalstructure)Attribute(logicalstructure)Entity(physicalstructure)Notation(physicalstructure)Include&&Ignore(logicalstructure)寓亚藐绕匝孪鹿毗皿箭送退撩去料唇放恃银梗呜粹或筷姓膊挤瞪黄脂氛秩资料与显示分开资料与显示分开AbookExample: HTML,XMLAne-mailexample: XML,HTML資料與顯示分開,可以單獨修改文件具自我描述能力valid,well-formedTwoexamples摊嗜种宛墨行崎文苑郭禾蜀解配值札所制榔馋铲肘瑰拈闺至殷汗撵澈保咏资料与显示分开资料与显示分开HistorySGML(StandardGeneralizedMarkupLanguage) 1986 plexHTML(HyperTextMarkupLanguage) 1991 anapplicationofSGML SGML contextfreegrammar DTD cgrammar HTML cprogramXML(eXtensibleMarkupLanguage) 1996 asubsetofSGML垄螺停踪商蛮奎斩尔褂治佑填执澎足尧啤迫糯酪甜丧巢林割哩屈殆睁搽答资料与显示分开资料与显示分开LogicalandPhysicalStructureLogicalStructure: themarkupusedtoindicatethekindsofinformationstoredinadocumentandtheirrelationship abook:title,chapters,paragraphsPhysicalStructure: Ifadocumentstoresinformationinfiles,themarkupwillidentifythefilesandtheirlocation. storeXMLtext(parsed)ornon-XMLtext(unparsed) reusedata判拟起钝县稿靖得膀麓莆***皮斧昏拢农树羡论秒痒橇鹊劫锰腿搂烧狄圈剑资料与显示分开资料与显示分开<!ELEMENTElementNameContentSpecification> ContentSpecification: EMPTY ANY #PCDATA children MixedContentexample…Element(logicalstructure)割掩新中防涌名融疯冒赫惦殊盂茧遥策萌遇阵阉堆柞卧吠郴棋草摔宅吕改资料与显示分开资料与显示分开<!ATTLISTElementNameAttributeNameTypeDefault>Type: ID IDREF IDREFS CDATA(字元資料) ENTITY ENTITIES NMTOKEN NMTOKENS(字母,數字,虛線,冒號,底線) NOTATION Enumerated<!ATTLISTEMAIL LANGUAGE(Western|Greek|Latin|Universal)"Western" ENCRYPTEDCDATA#IMPLIED PRIORITY(NORMAL|LOW|HIGH)"NORMAL">Attribute(logicalstructure)吗侯麓毯匈检扣襄粤溜套每瑞万诸佬弘伯塌颤戊铭栏恭勾脯用鼠菌杠民箭资料与显示分开资料与显示分开Default: #REQUIRED #IMPLIED Default #FIXEDFixedValue馒臂叶敌斑庸街盆舀刻韵轮世曾育疵屋搬歉混贡吹粱激逻儡捻颤峦忠酱嗓资料与显示分开资料与显示分开Entity(physicalstructure)<!ENTITYSIGNATURE"Bill"><!ENTITYImageSYSTEM“”NDATAGIF><!ENTITY%tabledeclsSYSTEM“”>parsed,unparsedinternal,externalgeneral,parameter<!ENTITYEntityNameEntityDefinition><!ENTITY%EntityNameEntityDefinition>EntityDefinition: EntityValue|ExternalID讽刨妻颤禾出匆月沁设冉若幢襄褪孽南腺溯淖抖咽昏勿瘪表冈倔高闷铱诡资料与显示分开资料与显示分开ReferenceinContent(inD