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Cascading Style Sheets (CSS), Interoperability, Maintenance, Portability, Sustainability of a website, Web Accessibility.
Cascading Style Sheets (CSS) is a computer language used to describe the presentation of HTML and XML documents. This language is standardized by the W3C.
Especially in websites, the use of Cascading Style Sheets lets us separate the contents from their containers. This way, the management of the web pages is much easier and faster, and the content (HTML document) of the website can be updated without changing the design. Likewise, the design can be updated without changing the content.
Interoperability is the capability that an equipment or a system has to interact with other existing or future equipment or systems with no loss or alteration of its own functions.
There is often a confusion between interoperability and compatibility. The former term is used when all the interfaces of communication and interaction are known as well as the way it works.
This point is very important even crucial in networks. Chosing interoperable equipment lets them work properly in a network at a lower cost.
Maintenance of computers or networks is the practice of diagnosing a failure, controlling and fixing of equipment or services.
Maintenance can be preventative or corrective, hardware or software.
Portability of a website or program is the capability to work in various hardware or software environments.
Sustainability of a website is caracterized by the use of longlife solutions during its conception. That means from the beginning, we chose solutions which will be still working in the Web of tomorrow.
The use of obsolete functions during the creation of the website obliges us to redo it soon. Indeed, the Internet changes quick and some solutions worked yesterday but are not working any more today. Some solutions are still working today, but they will be abandonned tomorrow. People using that kind of solution in their websites will have to create soon a new budget to update them and make them work.
The use of W3C standards offers the guarantee that the website will not be impacted by such catastrophes.
The accessibility of a website is the question of the access to that website by a disabled person or from different browsers.
Technical standards have been created by the Web Accessibility Initiative (WAI) and the World Wide Web Consortium (W3C) so as to improve the accessibility of websites and to avoid digital isolation. Unfortunately, the rate of accessibility of websites still remains very low.