October 31, 2011 | 
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Written by www.dreamnetbd.com
On this week’s World Tech Update we take a look at news from Mobile World Congress in Barcelona including Microsofts preview of Windows Phone 7 Series, plans from Nokia and Intel to merge their mobile operating systems, new cell phones from Sony Ericsson and Samsung and Googles addition of Flash to its Android operating system. Taking a break from MWC well also look at an electric concept car from Rinspeed and gadgets from the American International Toy Fair in New York. Find out whats coming up on each weeks show by following us on Twitter (WorldTechUpdate) or check out our Facebook fan page at www.facebook.com/worldtechupdate Video Rating: 4 / 5
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“Never increase, beyond what is necessary, the number of words required to explain anything” (William of Ockham)
The online industry development determined the necessity for more complex web based technologies, in order to bring new improvements in business management. Because increasingly more people use the new interactive web technology, it is important to know what are the most popular of them and what their functions are.
1. HTML
What is a HTML file? HTML official name of the standard is Hyper Text Markup Language. A HTML file is a text file with an “Htm” or. “Html” extension, including besides the pure text, standard instructions (related to web design).
The language was developed in the early’90 due to lack of a universal language; HTML determined a spectacular development of the online environment. HTML tags in the document indicate to the browser how to display the file useful content.
2. CSS
CSS means Cascading Style Sheets. A CSS file is a text file with the “.css” extension, defining styles for HTML pages. The styles show in a much more rigorous way than the HTML attributes how the browser should display elements of a HTML document (text, graphics, forms, etc. ..), providing higher possibilities than the HTML standard HTML.. CSS files allow the HTML documents stylization with significantly lower effort than by using tags.
3. XML
XML means EXtensible Markup Language (official name of the standard). It was designed to handle data rigorously. XML language is special because it doesn’t contain predefined tags. Basically, XML tags are defined (constructed) only by the user. Therefore, it is an extensible language. It must be mentioned that XML is similar to HTML only in a very general way. While HTML displays data having as objective the way in which they look in the browser, XML objective is to structure store and transmit data in the form of user information. HTML displays information, while XML describes and administrates information rigorously. Note: XML is not a replacement for HTML. A web trend suggests a mutual completion of the two standards by using them together in the same documents: XML will be used to describe the data, while HTML will format and display the data properly.
4. XSL
XSL means EXtensible Style Language (official name of the standard). Basically, XSL represents for XML document what CSS is for HTML, meaning a style sheet. The difference between CSS (HTML Style Sheets) and XSL (XML Style Sheets) is significant. HTML uses predefined tags (bookmarks) and their meaning is known and understood from the start by the browser. For example, the tag defines a table, and the browser knows what it is and how to display it. By adding styles to the HTML file, we’ll indicate to the browser to display a page element (such as the exemplified table) in a certain manner, using thus time predefined CSS attributes. We know that XML doesn’t work with predefined tags, so the meaning of XML tags used by a web designer is not known by the browser. The tag in XML can be perceived by the browser as a table, a form or an abstract object and the browser will not know how to display it.
Therefore, it should be added an additional component of XML documents to translate to the browser the way in which a XML document should be displayed. This is XML. However, XSL is more than a style standard for XML documents.
Basically, XSL consists of 3 components:
ü XSLT, a language designed to transform XML documents in XHTML documents;
ü XPath, a language designed to define and isolate portions of XML documents;
ü XSL-FO, a superior language that structures XML documents;
5. XHTML
What is a XHTML file? XHTML means EXtensible HyperText Markup Language (official name of the standard). It is a modern replacement of HTML language, being almost identical to the HTML 4.01 standard, an improved version, much more accurate and strict of HTML 4.0 standard. HXTML represents a XML definition type of a HTML document, a combination between HTML and XML. The advantages of using a XHTML application are multiple: XHTML tags can be read by all XML devices, while being compatible with all the web browsers without requiring additional specifications.
6. JavaScript
JavaScript is a scripting language currently used by most websites to improve the overall design, validate forms of user data, interacting with the user through special effects applicable to page elements according to the events generate by users. In the present, JavaScript is the most important scripting language on the Internet.
7. DHTML
First, DHTML doesn’t mean, as it might be believed, Dynamic HyperText Markup Language a so-called official designation of the standard). DHTML is basically a standard (there are no files with a DHTML extension). DHTML is a generic name adopted unanimously by web designers, which represents the art to combine HTML, CSS and JavaScript, in order to create truly interactive websites, adding a strong touch of impact on users and developing one of the most spectacular visual effects.
8. Java
Java is currently one of the most powerful platforms of software development, being an independent programming language, which brings in the online environment exceptional opportunities for client-server interaction, far beyond the well known forms, animations, games and interactive visual effects. Practically, JAVA technologies (that are often combined with other technologies or standards such as XML) represent a much closed way to the natural for implementing applications by handling successfully almost all types of generators and consumers of information from mobile phones to online transactions management systems.
The portability and extensibility of the two technologies (Java and XML) makes them the perfect choice for to meet a range of impressive Internet requirements, from the simplest programs to applications running on different platforms interconnected, being developed on the most advanced security stability and portability levels.
9. PHP
For a business website (that sells products) are needed about 500 content pages and 2000 pictures; despite this, there is an easy alternative to the hard work of updating and maintaining such a website. Yahoo and Amazon haven’t hired thousands of people to make daily changes to their pages, right? To add or edit a HTML web page, you must download it from the server, to apply the necessary changes and to find the other pages that might be affected because of changing the links. Then, you must apply on each page the required changes and to transfer it back to the server. If a website has 500 pages updated in this manner every day of the week, selling products, offering advanced search features, while tracking accurate sales inventory and customers’ records, then the prospect of such work can only frighten even the most stubborn web developer.
By using a database connected to a web page through the “server-side” language, the web developer doesn’t need anymore adjustments in the pages code to change periodically their content or to offer the facilities mentioned above.
Creating dynamic and interactive websites by using the PHP technology combined with MySQL database, using an Apache server, is one of the best things you can do.
10. JSP
JSP is a technology alternative to PHP, used for the same purpose- to create dynamic and interactive websites. By combining Java power and extensibility with the labels script ease of use and simplicity, Java Server Pages quickly became the most preferred language by many professional programmers to develop web-based applications.
Written by andra picincuProfessional content writer and web marketing consultant