XHTML-INTRODUKSJON - TECHCODEVIEW.COM

XHTML eller EXtensible HyperText Markup Language er en blanding av HTML og XML, veldig lik HTML men strengere. Det er som en regelbok for å lage nettsider som nettlesere lett kan forstå. I motsetning til HTML, må du være forsiktig og følge reglene nøyaktig. De fleste nettlesere støtter det. Bare tenk på det som en mer presis måte å skrive webkode på.

Innholdsfortegnelse

Historie
Overgangs DTD
Strenge DTD
Rammesett DTD
Hvorfor bruke XHTML?
Fordeler med XHTML
Forskjellen mellom HTML og XHTML

Historie

Den ble utviklet av World Wide Web Consortium (W3C) og hjelper webutviklere med å gå fra HTML til XML. Med XHTML kan utviklere gå inn i XML-verdenen med alle dens funksjoner samtidig som de sikrer bakover- og fremtidig kompatibilitet av innholdet. XHTML-familien inkluderer tre dokumenttyper; den første er XHTML 1.0, som ble anbefalt av W3C 26. januar 2000. Den andre er XHTML 1.1, som ble anbefalt av W3C 31. mai 2001.

Den tredje er XHTML5, en standard som brukes for å utvikle en XML-tilpasning av HTML5-spesifikasjonen. Et XHTML-dokument må ha en XHTML-erklæring.

Elementer i XHTML:

XHTML-element	Beskrivelse
`>`	Brukes til å deklarere Document Type Definition (DTD), som spesifiserer reglene for markup-språket, og sikrer riktig gjengivelse i nettlesere.
`>`	Omslutter hele HTML- eller XHTML-dokumentet, og fungerer som rotelementet.
`>`	Inneholder metainformasjon om dokumentet, for eksempel tittel, tegnsett, koblede stilark og andre viktige elementer.
`>`	Nestet i hodedelen, spesifiserer tittelen på dokumentet, vist i nettleserens tittellinje eller fane.
`>`	Omslutter innholdet på nettsiden, inkludert tekst, bilder, lenker og andre HTML-elementer. Den representerer den synlige delen av dokumentet som vises i nettleseren.

Når du oppretter en XHTML-webside, er det nødvendig å inkludere en DTD (Document Type Definition) erklæring. Det er tre typer DTD som diskuteres nedenfor:

Overgangs DTD:

Det støttes av de eldre nettleserne som ikke har innebygde støtte for kaskadestilark. Flere attributter er vedlagt i body-taggen som ikke er tillatt i streng DTD.

Syntaks:

 PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'DTD/xhtml1-transitional.dtd'>

Eksempel: I dette eksemplet vil vi se koden for å skrive et XHTML-dokument med et eksempel.

html

xml version='1.0' encoding='UTF-8'?>        Transitional DTD XHTMLtitle> head> <body bgcolor='#dae1ed'>   <div>font-weight:bold;text-align:center;  margin-bottom:-25px;'>techcodeview.comdiv> <p style='text-align:center;font-size:20px;'>En informatikkportal> <p style='text-align:center;font-size:20px;'>Alternativ for å velge måned: <select name='month'>   <option selected='selected'>Januaralternativ> <option>Februaropsjon> <option>Marchoption> <option>Aprilopsjon> <option>Mayoption> <option>junialternativ> <option>Julialternativ> <option>Augustyopsjon> <option>September alternativ> <option>oktoberalternativ> <option>Novemberalternativ> <option>Desemberalternativ> velg> p> brødtekst> html>> </code> </td>  </tr>  </tbody>  </table>  <p> </p>  <i id='output-icon' title='Output'> </i>  <p> </p>   <p> </p>  <i id='copy-url-button' title='Copy Generated Ide URL'> </i>  <p> </p>   <p> </p>  <p dir='ltr'>  <b>  <strong>Produksjon: </strong>  </b>  </p>  <p> <img src='//techcodeview.com/img/html-xml/79/xhtml-introduction.webp' alt='overgangsdtd xhtml'> <span>  </span> </p>  <h2 id='strict-dtd'>  <b>  <strong>Strenge DTD: </strong>  </b>  <span>  </span> </h2>  <p dir='ltr'> <span>Strenge DTD brukes når XHTML-siden kun inneholder markup language. Strict DTD brukes sammen med cascading style sheets, fordi dette attributtet ikke tillater CSS-egenskap i body-taggen. </span> </p>  <h3>  <b>  <strong>Syntaks: </strong>  </b>  </h3>  <pre> PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN' 'DTD/xhtml1-strict.dtd'> </pre>  <p dir='ltr'>  <b>  <strong>Eksempel 2: </strong>  </b>  <span>I dette eksemplet vil vi se koden for å skrive et XHTML-dokument med et eksempel for streng DTD. </span> </p>  <h2>html </h2>  <i id='copy-code-button' title='Copy Code'> </i>  <p> </p>  <p>  <i id='run-and-edit-button' title='Edit Code' lang='xml'> </i>  <br>   </p>  <p>  <i id='run-code-button' lang='xml' title='Run Code and See Output'> </i>  </p>  <p>  <i id='generate-url-and-run-button' title='Run Code and Generate IDE URL' lang='xml'> </i>  <br>  <i title='Dark Mode'> </i>  <br>  <i id='edit-on-ide-button' title='Edit on IDE' lang='xml'> </i>  </p>  <p> </p>  <table class="table">  <tbody>  <tr>  <td>  <code>xml version='1.0' encoding='UTF-8'?>   <html xmlns=' http://www.w3.org/1999/xhtml ' xml:lang='en' lang='en'>  <head>   <title>Strenge DTD XHTMLtitle> head> <body>   <div>font-weight:bold;text-align:center;  margin-bottom:-25px;'>techcodeview.comdiv> <p style='text-align:center;font-size:20px;'>En informatikkportal> <p style='text-align:center;font-size:20px;'>Alternativ for å velge måned: <select name='month'>   <option selected='selected'>Januaralternativ> <option>Februaropsjon> <option>Marchoption> <option>Aprilopsjon> <option>Mayoption> <option>junialternativ> <option>Julialternativ> <option>Augustyopsjon> <option>September alternativ> <option>oktoberalternativ> <option>Novemberalternativ> <option>Desemberalternativ> velg> p> brødtekst> html>> </code> </td>  </tr>  </tbody>  </table>  <p> </p>  <i id='output-icon' title='Output'> </i>  <p> </p>   <p> </p>  <i id='copy-url-button' title='Copy Generated Ide URL'> </i>  <p> </p>   <p> </p>  <p dir='ltr'>  <b>  <strong>Produksjon: </strong>  </b>  </p>  <p> <span>  </span> <img src='//techcodeview.com/img/html-xml/79/xhtml-introduction-2.webp' alt='streng dtd xhtml'> <span>  </span> </p>  <h2 id='frameset-dtd'>  <b>  <strong>Rammesett DTD: </strong>  </b>  <span>  </span> </h2>  <p dir='ltr'> <span>Rammesettet DTD brukes når XHTML-siden inneholder rammer. Denne DTDen er identisk med HTML 4.01 Transitional DTD bortsett fra innholdsmodellen til HTML-elementet. </span> </p>  <h3>  <b>  <strong>Syntaks: </strong>  </b>  </h3>  <pre> PUBLIC '-//W3C//DTD XHTML 1.0 Frameset//EN' 'DTD/xhtml1-frameset.dtd'> </pre>  <p dir='ltr'>  <b>  <strong>Eksempel 2: </strong>  </b>  <span>I dette eksemplet vil vi se koden for å skrive et XHTML-dokument med et eksempel for rammesett DTD. </span> </p>  <h2>html </h2>  <i id='copy-code-button' title='Copy Code'> </i>  <p> </p>  <p>  <i id='run-and-edit-button' title='Edit Code' lang='xml'> </i>  <br>   </p>  <p>  <i id='run-code-button' lang='xml' title='Run Code and See Output'> </i>  </p>  <p>  <i id='generate-url-and-run-button' title='Run Code and Generate IDE URL' lang='xml'> </i>  <br>  <i title='Dark Mode'> </i>  <br>  <i id='edit-on-ide-button' title='Edit on IDE' lang='xml'> </i>  </p>  <p> </p>  <table class="table">  <tbody>  <tr>  <td>  <code>xml version='1.0' encoding='UTF-8'?>http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd '> <html xmlns=' http://www.w3.org/1999/xhtml '  xml:lang='en' lang='en'>  <head>   <title>Rammesett DTD XHTMLtitle> head> <frameset cols='30%, 20%, *'>   <frameset rows='40%, 30%, *'>   <frame src='gfg.html' />   <frame src='gfg1.html' />   <frame src='geeks.html' />rammesett> <frameset rows='40%, 60%'>   <frame src='g4g.html' />   <frame src='g4g1.html' />rammesett> <frameset rows='20%, 20%, 30%, *'>   <frame src='geeksforgeeks.html' />   <frame src='geeksforgeeks1.html' />   <frame src='geeksforgeeks2.html' />   <frame src='geeksforgeeks3.html' />rammesett> rammesett> html>> </code> </td>  </tr>  </tbody>  </table>  <p> </p>  <i id='output-icon' title='Output'> </i>  <p> </p>   <p> </p>  <i id='copy-url-button' title='Copy Generated Ide URL'> </i>  <p> </p>   <p> </p>  <p dir='ltr'>  <b>  <strong>Produksjon: </strong>  </b>  </p>  <h2 id='why-use-xhtml'> <img src='//techcodeview.com/img/html-xml/79/xhtml-introduction-3.webp' alt='rammesett dtd xhtml'>  <b>  <strong>Hvorfor bruke XHTML? </strong>  </b>  </h2>  <ul>  <li value='1'> <span>XHTML-dokumenter valideres med standard XML-verktøy. </span> </li>  <li value='2'> <span>Det er enkelt å vedlikeholde, konvertere, redigere dokument i det lange løp. </span> </li>  <li value='3'> <span>Den brukes til å definere kvalitetsstandarden til nettsider. </span> </li>  <li value='4'> <span>XHTML er en offisiell standard for W3C, nettstedet ditt blir mer kompatibelt og nøyaktig med mange nettlesere. </span> </li>  </ul>  <h2 id='benefits-of-xhtml'>  <b>  <strong>Fordeler med XHTML: </strong>  </b>  </h2>  <ul>  <li value='1'> <span>Alle XHTML-tagger må ha avsluttende tagger og er nestet på riktig måte. Dette genererer renere kode. </span> </li>  <li value='2'> <span>XHTML-dokumenter er magre, noe som betyr at de bruker mindre båndbredde. Dette reduserer kostnadene, spesielt hvis nettstedet ditt har 1000-vis av sider. </span> </li>  <li value='3'> <span>XHTML-dokumenter er godt formatert og godt utformet og kan enkelt transporteres til trådløse enheter, punktlesere og andre spesialiserte webmiljøer. </span> </li>  <li value='4'> <span>All nyutvikling vil være i XML (hvorav XHTML er en applikasjon). </span> </li>  <li value='5'> <span>XHTML jobber sammen med CSS for å lage nettsider som enkelt kan oppdateres. </span> </li>  </ul>  <h2 id='difference-between-html-and-xhtml'>  <b>  <strong>Forskjellen mellom HTML og XHTML: </strong>  </b>  </h2>  <table class="table">  <tbody> <tr>  <th> <span>HTML </span> </th>  <th> <span>XHTML </span> </th>  </tr>  </tbody> <tbody>  <tr>  <td> <span>HTML eller HyperText Markup Language er hovedmarkeringsspråket for å lage nettsider </span> </td>  <td> <span>XHTML (Extensible HyperText Markup Language) er en familie av XML-markeringsspråk som speiler eller utvider versjoner av det mye brukte Hypertext Markup Language (HTML) </span> </td>  </tr>  <tr>  <td> <span>Fleksibelt rammeverk som krever mild HTML-spesifikk parser </span> </td>  <td> <span>Begrensende delsett av XML som må analyseres med standard XML-parsere </span> </td>  </tr>  <tr>  <td> <span>Foreslått av Tim Berners-Lee i 1987 </span> </td>  <td> <span>World Wide Web Consortium-anbefaling i 2000. </span> </td>  </tr>  <tr>  <td> <span>Anvendelse av Standard Generalized Markup Language (SGML). </span> </td>  <td> <span>Bruk av XML </span> </td>  </tr>  <tr>  <td> <span>Utvidet fra SGML. </span> </td>  <td> <span>Utvidet fra XML, HTML </span> </td>  </tr>  </tbody>  </table>  <br>  <br>
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