计算机系统导论第六章答案,exercise5答案,免费的,计算机系统导论.doc

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a.Whatdoestheterm“XML”standfor?WhatisthefunctionofXMLtags,andhowdoesthefunctionofXMLtagsdifferfromthefunctionofHTMLtags?XMLisatextdocumentmarkuplanguagewhosefullnameisextensibleMarkupLanguage.XMLtagsisusedtodescribewhatapieceoftextmeans.TheXMLtagsdifferfromHTMLtagsmainlyintwofunctions:(1)OneisthatXMLtagsistodescribewhatapieceoftextmeanssuchas123whileHTMLtagsprimarilyconcernwithhowtextshouldbedisplayed.(2)AnotheristhatXMLhasnopredefinedtagswhileHTMLdoes.heirowntagsinXML.b.ContrasttheflexibilityofusingXMLtagsandHTMLtags.HTMLtags,whicharepredefined,limitustowriteHTMLdocumentsusingonlytagsthataredefinedintheHTMLstandard.However,XMLhasnosuchpredefinedtags.heirowntags.c.WhatisXSL?WhatisthefunctionofXSLintermsofXML?XSLmeansExtensibleStylesheetLanguage.ItsfunctionistospecifyhowanXMLdocumentwouldbeinterpretedanddisplayedbythebrowser.d.WhatdoesaDTDfiledo?DTDmeansdocumenttypedefinition.anizethedata.ADTDensuresthatallthedocumentationisformattedinthesameway.ApplicationscanusetheDTDtoreadanddisplaythecontentofthedocument.e.WhatisonereasonwhystoringdatainXMLmaybepreferredtoenablemultiplesystemstoexchangedata?XMLallowstheauthortodefinehisowntagsandhisowndocumentstructure.putersystemwouldbeabletointerpretanXMLdocument.DuetoXML'sflexibilityandinteroperability,.DownloadandsaveMovies100EX.xmlanddisplay.htmlonyourDesktop.OpenMovies100EX.xmlusingNotepad.exetoseethecontentoftheXMLfile.

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