Editing HTML element (section)

==Document head elements==

{{glossary}}
{{term|term=base |content= {{XMLElement|base|Base|end=no}} }}
{{defn|1= Specifies a '''base URL''' for all relative <code>href</code> and other links in the document. Must appear before any element that refers to an external resource. HTML permits only one {{tag|base|o}} element for each document. This element has [[HTML attributes]], but no contents.}}
{{defn|1= A development version of this element (as <code>BASE</code>) is mentioned in ''[[#HTMLTAGS|HTML Tags]]''; '''standardized''' in [[#HTML20|HTML 2.0]]; still current.}}

{{term|term=basefont |content= {{XMLElement|basefont|Base Font|deprecated=1|end=no}} }}
{{defn|1= Specifies a base font size, typeface, and color for the document. Used together with {{tag|font|o}} elements. [[Deprecation|Deprecated]] in favor of [[Style sheet (web development)|style sheets]].}}
{{defn|1= '''Standardized''' in [[#HTML32|HTML 3.2]]; '''deprecated''' in [[#HTML401|HTML 4.0 Transitional]]; '''invalid''' in [[#HTML401|HTML 4.0 Strict]].}}

{{term|term=isindex |content= {{XMLElement|isindex|Index|...|end=no|deprecated=1}} }}
{{defn|1= {{code|lang=html|code=<isindex>}} could either appear in the document head or in the body, but only once in a document. See [[Fieldset|Forms]].}}

{{term|term=link |content= {{XMLElement|link|Link|end=no}} }}
{{defn|1= Specifies links to other documents, such as ''previous'' and ''next'' links, or alternate versions.<ref>[[#HTML401|HTML 4.01]] §12.3</ref> A common use is to link to external [[Cascading Style Sheets|style sheets]], using the form, {{code|lang=html|code=<link rel="stylesheet" type="text/css" href="url" title="description_of_style">}}.<ref>[[#HTML401|HTML 4.01]] §14.3.2</ref>

A less-common, but important, usage is to supply navigation hints consistently through use of [[microformat]]s. Several common relationships are defined, that may be exposed to users through the browser interface rather than directly in the web page, such as: {{code|lang=html|code=<link rel="next" href="url">}}.

A document's {{tag|head|o}} element may contain any number of {{tag|link|s}} elements. This element has [[HTML attributes]], but no contents.
}}
{{defn|1= <code>LINK</code> existed in ''[[#HTMLDRAFT12|HTML Internet Draft 1.2]]'', and was '''standardized''' in [[#HTML20|HTML 2.0]]; still current.}}

{{term|term=meta |content= {{XMLElement|meta|Meta|end=no}} }}
{{defn|1= {{Main|Meta element}}
Can be used to specify additional [[metadata]] about a document, such as its author, publication date, expiration date, language, page title, page description, keywords, or other information not provided through the other header elements and [[HTML attributes]]. Because of their generic nature, {{tag|meta|s}} elements specify associative [[Associative array|key-value pairs]]. In general, a meta element conveys hidden information about the document. Several meta tags can be used, all of which should be nested in the head element. The specific purpose of each {{tag|meta|s}} element is defined by its attributes. Outside of [[XHTML]], it is often given without the slash ({{tag|meta|o}}), despite being a [[#Void elements|void element]].

In one form, {{tag|meta|s}} elements can specify [[HTTP]] headers which should be sent by a [[web server]] before the actual content. For example, {{code|lang=html|code=<meta http-equiv="foo" content="bar" />}} specifies that the page should be served with an HTTP header called <code>foo</code> that has a value <code>bar</code>.

In the general form, a {{tag|meta|s}} element specifies <code>name</code> and associated <code>content</code> HTML attributes describing aspects of the HTML page. To prevent possible ambiguity, an optional third attribute, <code>scheme</code>, may be supplied to specify a semantic framework that defines the meaning of the key and its value. For example, in {{code|lang=html|code=<meta name="foo" content="bar" scheme="DC" />}} the {{tag|meta|s}} element identifies itself as containing the <code>foo</code> element, with a value of <code>bar</code>, from the DC or [[Dublin Core]] [[Resource Description Framework|resource description framework]].
}}
{{defn|1= '''Standardized''' in [[#HTML20|HTML 2.0]]; still current.}}

{{term|term=object |content= {{XMLElement|object|Object}} }}
{{defn|1= Used for including generic objects within the document header. Though rarely used within a {{tag|head|o}} element, it could potentially be used to extract foreign data and associate it with the current document.}}
{{defn|1= '''Standardized''' in [[#HTML401|HTML 4.0]]; still current.}}

{{term|term=script |content= {{XMLElement|script|Script}} }}
{{defn|1= Can act as a container for script instructions or link to an external script with the optional <code>src</code> attribute.<ref>[[#HTML401|HTML 4.01]] §18</ref> Also usable in the document body to dynamically generate either both block or inline content.}}
{{defn|1= '''Standardized''' in [[#HTML32|HTML 3.2]]; still current.}}

{{term|term=style |content= {{XMLElement|style|Style}} }}
{{defn|1= Specifies a [[Cascading Style Sheets|CSS style]] for the document, usually in the form, {{code|lang=html|code=<style type="text/css"> ... </style>}}.
Can either act as a container for style instructions or link to external style sheets – for example, in [[Cascading Style Sheets|CSS]], with <code>@import</code> directives of the form,<ref>[[#CSS1|CSS]] §1.1</ref> {{code|lang=html|code=<style> @import url; </style>}}
}}
{{defn|1= '''Standardized''' in [[#HTML32|HTML 3.2]]; still current.}}

{{term|term=title |content= {{XMLElement|title|Title}} }}
{{defn|1= This tag defines a document title. Required in every [[HTML]] and [[XHTML]] document. User agents may use the title in different ways. For example:
* Web browsers usually display it in a window's [[title bar]] when the window is open, and (where applicable) in the [[task bar]] when the window is minimized.
* It may become the default file-name when saving the page.
* We can use <title> element only one time in a web page, and when we make another page then we will use again another <title> element with new title (do not take same name for all title tag in website, It can be problem for search engines).
* [[Web search engine]]s' [[web crawler]]s may pay particular attention to the words used in the title.
The {{tag|title|o}} element must not contain other elements, only text. Only one {{tag|title|o}} element is permitted in a document.
}}
{{defn|1= Existed in ''[[#HTMLTAGS|HTML Tags]]'', and was '''standardized''' in [[#HTML20|HTML 2.0]]; still current.}}
{{glossary end}}