HTML is certainly a well-known coding language used by site designers to generate internet pages and not to mention full web sites can be done applying html code alone. HTML is short for Hypertext Markup Language and has been made use of basically since the start of the net, but as the web has evolved, several common html practices also have evolved.
To illustrate, applying tables to design a web page was initially quite normal in the early days of the world-wide-web but as web browsers changed and technology improved, brand new approaches like CSS progressed to allow site designers to build web sites that could be shown in the same way across numerous internet browsers (browser compatibility) and also exactly the same internet browsers but different variants (version compatibility).
A further enlargement came with the development XHTML, an acronym for Extensibe Hypertext Markup Language, a more recent, more versatile version of HTML.
XHTML is part of the family of XML languages even though it is furthermore an extension of HTML, if not more closely relevant to html version 5.0, it is actually developed to perform far more robustly with xml dependent user agents and also properties.
XHTML will also be referred to as an application of XML as it is actually a more prohibitive subset of SGML, which means that unlike html, it is possible to parse xhtml documents by using a common xml tool, similar to an xml parser.
The only requirement is that the xhtml document should be well formed because there are specified xml rules to go by, whereas with html, you simply can't parse it unless you happen to be running a more lenient, html specific parser.
The main variation regarding xml and html is that xml is a markup language, there are no semantics involved and simply no rules as to what exactly could and can't be included, xml merely describes the data. Html conversely has semantic meaning and states how data and text is intended to be viewed.
For example, in html, you can only make use of the head tag to describe the header elements, where as all body components must be contained inside of the body tag, to incorporate a paragraph you have to include it within a paragraph tag, this is precisely what is meant by the term semantics. XML as, I have just mentioned, has absolutely no semantic tags or predetermined meanings, for instance inside an xml document your tags will be able to have any meaning as well as any data, you create your own tags.
Due to all these key differences, xml, unlike html, is not something that a person can look at with the naked eye on any website, instead it sits in the background, or the source code of the internet site, as internet websites grew to become more dynamic entities, not to mention the requirement to consume this data originated via completely different platforms, from tablets, to PCs to smart phones, XML turned out to be a lot more crucial to making certain that this information was ordered, stored and transferred in a dependable and universal approach.
Xhtml satisfied an important objective and was in fact made for a number of purposes. The principal good reason had been to fix the compatibility gap between a client computer and a webpage on a remote computer, a language was needed that could transport and express the meaning of data on a web page to a pc, xhtml filled this need.
The next reason was basically to satisfy the gap for a standard language format which might be properly viewed across various internet browsers and platforms as well as on different screen types, again xhtml satisfied this particular requirement beautifully.
With the huge selection of various gadgets, from smart phones, PCs, laptops, tablets, not to mention distinct internet browsers from Internet Explorer to Mozilla, and variants from IE7 to IE8, it is extremely critical for any would be web designer to migrate from html to xhtml development to permit your websites to display effectively across all platforms and browsers.
No comments:
Post a Comment