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The language for an element should be specified with a lang attribute rather than the XHTML xml:lang attribute. XHTML uses XML's built-in language-defining functionality attribute. Remove the XML namespace (xmlns=URI). HTML has no facilities for namespaces. Change the document type declaration from XHTML 1.0 to HTML 4.01.
If the web application exceeds more than one page then each page must have a manifest attribute that points to the cache manifest. Every page referencing the manifest will be stored locally. [6] The cache manifest file is a text file located in another part of the server. It must be served with content type text/cache-manifest [7]
It is a piece of markup language used to adjust the behavior or display of an HTML element.HTML attributes are a modifier of a HTML element type. An attribute either modifies the default functionality of an element type or provides functionality to certain element types unable to function correctly without them. In HTML syntax, an attribute is ...
In cases where the content attribute's value is a URL, many authors decide to use a link element with a proper value for its rel attribute as well. [27] For a comparison on when it is best to use HTTP-headers, meta-elements, or attributes in the case of language specification: see here.
Module:Lang/data/iana regions – from IANA language-subtag-registry file; language variant data Module:Lang/data/iana variants – from IANA language-subtag-registry file; suppressed-script data Module:Lang/data/iana suppressed scripts – from IANA language-subtag-registry file; The data set also includes supplementary data modules:
A document type declaration, or DOCTYPE, is an instruction that associates a particular XML or SGML document (for example, a web page) with a document type definition (DTD) (for example, the formal definition of a particular version of HTML 2.0 - 4.0). [1]
Dynamic HTML, or DHTML, is a term which was used by some browser vendors to describe the combination of HTML, style sheets and client-side scripts (JavaScript, VBScript, or any other supported scripts) that enabled the creation of interactive and animated documents.
In HTML DOM (Document Object Model), every element is a node: [4] A document is a document node. All HTML elements are element nodes. All HTML attributes are attribute nodes. Text inserted into HTML elements are text nodes. Comments are comment nodes.