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tods5eshoes · Wysłany: Pon 18:19, 07 Mar 2011 Temat postu: jimmy choo sandal 0742

The History Of Xml
Three IBM employees, Charles Goldfarb, Ed Mosher and Ray Lorie invented a predecessor to XML as a way to mark up technical documents with structural tags in the 1970's. GML represents each of these inventor's initials. Goldfarb invented the term "mark-up language" and GML became the Standard Generalized Markup Language that was later adopted by the ISO (International Organization for Standardization) in 1986. Later SGML evolved into HTML (Hypertext Markup Language). HTML uses tags to develop web pages and is an SGML application.
Although SGML and HTML were widely used,[link widoczny dla zalogowanych], both had limitations. SGML is too complex for everyday internet applications and is very expensive to use. For example, adding SGML capability to a word processor could double or triple the cost and commercial browsers do not support SGML. Even though HTML was free and received much support,[link widoczny dla zalogowanych], the markup language had serious defects. HTML was a terminally polluted language with many limitations.
In 1996,[link widoczny dla zalogowanych], World Wide Web Consortium (W3C) users discussed how they could define a markup language combining the power and extensibility of SGML with HTML simplicity. This consortium sponsored a group of SGML experts including John Bosak from Sun. An eleven member-working group stripped away all the non-essential,[link widoczny dla zalogowanych], unused, cryptic parts of SGML to form a new markup language called XML. Tim Bray and C. M. Sperberg-McQueen wrote the 26-page specification manual. XML was designed via emails and weekly teleconferences over a period of twenty weeks from July to November 1996. After the first working draft was released, designing continued in 1997, and the W3C recommended XML 1. 0 on February 10, 1998 for use as a new markup language for the World Wide Web.
The definition and benefits of XML is explained in the W3C online tutorial. XML or EXtensible Markup Language was designed to describe data and resembles HTML. The programmer must define each tag since XML tags are not predefined. XML uses a self-descriptive Document Type Definition (DTD) or an XML Schema to describe the data. A Document Type Definition is a specification for the mark-up and validates that the document contains data stored in the intended structure. W3C recommends XML for use in World Wide Web applications. The main positive benefits of XML are that it is cross platform compatible.
There are many advantages for using XML. It is text-based and platform independent. It supports Unicode (any language may be used to convey information). It can represent record, list, and tree data structures. It is based on international standards and its hierarchical structure works with most types of documents. It makes parsing algorithms simple, efficient, and consistent.
It is recommended that XML programmers and users interested in creating XML Schemas should invest in an XML editor. An XML editor is a markup language editor used for editing XML documents. XML editors have added functionality for tag completion, menus, and buttons for common XML editing tasks based on Document Type Definition data or the XML tree.
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