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1 W3C Recommendation HTM L(e <\tensible HyperText Markup Language) - A Reformu, 김 tion of HTML 4.0 i.η XML 1. 0 KangHee, Kim The World Wide Web Consortium(W3C) released the 1.0 specification as a W3C Recommendation on Janua 마 26, 2000 (12 lue@modnne t. co. kη (htto:/ Modnnet inc. / bur,:{ f 2 KRN ET 2000 SGML - HTML SGML (Standard Generalized Markup Language) is a complex meta language for describing markup (Hypertext Markup Language) is an application of SGML that serves to display the content of documents languages, particularly those used in electronic document exchange, document management, and document publishing blue@modnnet.cq.kr HTML Limitations M 爛 et HTML Limitations, with its limited and fixed set of markup elements, is not well suited to : rendering the complex documents seen on the web today outputing documents to other display formats, e.g., handheld computers, cell phones, household appliances limitations have been addressed by: the development of browser specific markup, and elaborate workarounds etc. Res 비 ting in bloated HTML markup that is interpreted inconsistently across cu rrent browsers blue@modnnet.cq,kr - 63-

2 HTML Limitations XML 뺑 et was designed to display data, Not to describe what data is can label the parts of an order for a shirt by row, column between the markup tags, e,g., this is a price, this is a size, this is a quantity, this is a color XML(Extensible Markup Language) is a simplified version of the SGML meta language XML can control the appearance as well as the meaning of document content, making it easier for machines to read and manipulate document content blue@ modnne l. co. 싸 Reformulation of HTML 4 in XML From HTML to? Reformulation of HTML 4 document types as ap미 ications of XML Compatible with current browsers 떠 gged documents can be, mandating *markup conformance* makes it easier for machines to read and display d<χuments read without a browser u 며 rade Compatible with future browsers to be developed to support XML blue@modnnel.co.kr blue@modnnel.co.kr htto: Ilwww.modnnel. co.kr 10 From HTML to? 찢랭 From HTML to? 뺑 et is extensible, so that Known HTML 4 can be mixed with new elements form other XML vocabularies, including those developed by the W3c for : Multimedia (SMIl-Synchronized Multimedia Integration Language) Science (Mathematical expressions - MathM) Tow dimensional vector graphics(scalable Vector Graphics-SVG) Metadata(Resource Description Framework-RDF) is designed for user agent interoperability(portability) and accessibili 마 50 that non-desktop, nontraditional display devices, e.g., cell phones, pdas, appliances, can have web content tailored to their need5 b l ue@modnnet.c 싸 htto:ll co. kr

3 From HTML to? Markup Language M 灣 et 1.1, currently under development, is equipped with device specific style sheets and composite capability jpreference profiles(ccjpp), a protocol which allows a device to identify itself to a web server, describe its limitations, and download the information it is capable of displaying. CCjPP works because documents can be split into modules that can be downloaded separately s SGML I I Subset XML HTML HTML Etc. HTML Etc SG M L 4.0 XML XML \.0 t blue@modnnel.co.kr Markup Language XHML HTML 2 XML IS08879(SGML) Element TBL, MATCH, CGM -Fonn -In-Line lmage -Typographic Element -Feature -TextEntity(variant Syntax) -Math(Text-Oriented) -TEL -Client-Oriented Form -HyperLinking Stylesheet property defmition IETM AF(sementic) -Empty - Fault-a\ts - If-step Hyt피le - Element Form - AF MID K R N 만 2000 Document Structure 4 An document consists of 3main parts : the DOC I YPE the Head the Body? Document Type Definition > Namespace Declaration There are currently 3 document types : Strict Transitional <!DOC7 YPE htm/ PUBLIC "-jjw3ιijdtdxj서 TML 1. 0 Transítíonal//EN" "DTDjxhtm/l-ransítíona/. dtd 낀 Frameset The html tag must have a namespace declaration An namespace is the list of valid tags that can be used in <html xmlns='' xml:lang=''en'' lang=' 'en 낀 hltp:llwww.modnne l.co.kr 8-65-

4 Document Structure The <head> and <bt. 져 y> elements must be present <tit/e> must be the first element in the <head> Minimal Document <!DOCTYPE html PUBUC -//W3C//DTD 1.0 Transitional //EN" "DTD/xhtmll-transitional.dtd"> <html xmlns=h 야 p:// 미 11 xlm:lang="en" lang= 갱 n"> <head> <title> blue KangHee, Kim 's Space</tit1e> </head> <body> <p> 서 ello World </p> </body> </html> b l ue@modnr e t. co. kr and HTML Differences and HTML Differences Lower case Tag5 and Attribute Elements must properly nest Tag( element) and attribute names must be written in lower case. <10 BGCOLOR = "#FFOOOO"> <td bgcolor = #ffoooo"> Note * user-defined attribute values can be any case, e.g. = #ffoooo' can also be #FFOOOO Element must properly nest, with no overlapping.html <p> Hello<b>World<!p><!b> <p> Hello<b>Wo 꺼 d<!b><!p> b l ue@modnne t. c W modnnet. co,kr 22 KRN ET 2000 and HTML Differences and HTML Differences Empty Elements must Close AII non-empty elements must be closed <p> first paragraph <p> second paragraph <p> first paragraph</p> <p> second paragraph</p> Empty elements(those without a closing tag in HTM 니 must be closed <hr> <br> <img src="blue.gif"> <hr /> <br /> <img src="blue.gif" /> co.kr

5 and HTML Differences and HTML Differences Attribute Minimization Forbidden Attribute Values must be quoted <table rows=2> <table rows= 2"> Attribute value pairs cannot be minimized. (An attribute is minimized in HTML when there is only one possible value) <td nowrap> Hello World</td> <td nowrap= nowrap">hello World</td> and HTML Differences id Attribute Replaces name Attribute and HTML Differences <script> And <5 야 le> Elements The id attribute replaces the name attribute <image SrC = "me.gif" name=blue> <image src ="me.gir" id=blue /> Note : To interoperate with older browsers, you might user both the name and id attributes with identical values In, characters like < and &" and treated as part of the markup To avoid this when using <script> and <style> elements, wrap the content of the script of style element within a CDATA-marked section and HTML Difference5 <script> And <style> Elements 灣 el and HTML Differences <script> And <style> Elements 關 et <script language = JavaScript"> <!- - <![CDATA[ document. write(' <b> he리테110 ] 끄 ]> jj - -> <jscript> WO 야 r 끼 띠 d<jb>" ') You can avoid using CDATA by using : <script language= JavaScript" srπc= γ '/SOlωu 마 jπrπcecode. 춰 "> </script> to read your script code off the server, or <link href= mystylesheet.css" /> to bad an external C55 file co.kr 29 b lue@mo dn ne t. c kr KRN ET

6 More Information 짧켓 World Wide Web Consortium (W3C) http: / / /xhtml Pressrelease. html.en The Emperor has New Clothes : HTML Recast as an XML Application http: //irt. oro/articles/is 1 92/index. htm The modnnet Web site / co.kr/xhtml/ blue@modnne l. c ι KRN 던

XHTML. XHTML stands for EXtensible HyperText Markup Language. XHTML is the next generation of HTML. XHTML is almost identical to HTML 4.

XHTML. XHTML stands for EXtensible HyperText Markup Language. XHTML is the next generation of HTML. XHTML is almost identical to HTML 4. 3 XHTML What is XHTML? XHTML stands for EXtensible HyperText Markup Language XHTML is the next generation of HTML XHTML is aimed to replace HTML XHTML is almost identical to HTML 4.01 XHTML is a stricter