...Why Internationalization? With the Internet fast speed developing, more and more people aware of the importance of Internet. I am sure that everybody may very familiar with web addresses, which are used to indicate resources on the web. Traditional web addresses are formed by only ASCII characters, such as a-z, A-Z, and so on. Nowadays, a multilingual web address is showing up on the internet, this kind of web address are not just containing ASCII characters, it could be formed by all kind of Unicode, such as Chinese language, Russia languages. But how could this happen? How does it work? Following I will illustrate these issues in details. Traditional web addresses are represented by uniform resource identifiers, which is URI in short. RFC 3986, the generic syntax for URI, defines a grammar that is a superset of all valid URIs, allowing an implantation to parse the common components of a URI reference. The characters that RFC 3986 allowed are only English languages, European numerals and a small number of symbols. This explains why traditional web addresses could only be formed by ASCIIs. In order to satisfy users could use their native languages in web addresses, here comes another identifier, Internationalized Resource Identifiers, which making URI system more worldly and accessible. Previous Knowledge---Uniform Resource Identifiers Uniform Resource Identifiers, which also called URI, are used for expressing traditional web addresses. Web addresses indicated by URI are...
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