Website designers can consider that it is good practice to comply with the online www standards. This is usually done using a description specifying the web standard being used on each webpage. If they do not comply with the rules, it can make a web page not work or liable to page errors, but the rules relate to the proper formatting of the pages for clearer reading and to ensure elements are properly made, used and terminated. This includes errors in the HTML and CSS, the website design is to be more organised for the coding and to make sure that the IDs and classes are done properly. Poorly coded web pages are useless. Quality checking through W3C is done with a proper DOCTYPE declaration, which is used to identify errors in the code. The system identifies the errors and areas which do not comply with the standards of website design. This information can be fixed by the webmaster. See Web NI on webni.uk for information.