Code Validation
This website is compliant with the following standards:
(Click to see validation)
(Click to see validation)
Is validation some kind of quality control? Does "valid" mean "quality approved by W3C"?
Validity is one of the quality criteria for a Web page, but there are many others. In other words, a valid Web page is not necessarily a good web page, but an invalid Web page has little chance of being a good web page.
For that reason, the fact that the W3C Markup Validator says that one page passes validation does not mean that W3C assesses that it is a good page. It only means that a tool (not necessarily without flaws) has found the page to comply with a specific set of rules. No more, no less. This is also why the "valid ..." icons should never be considered as a "W3C seal of quality".
What does “Valid CSS” mean? Which version of CSS does the CSS validator use?
According to the CSS 2.1 Specification: The validity of a style sheet depends on the level of CSS used for the style sheet. […] valid CSS 2.1 style sheet must be written according to the grammar of CSS 2.1. Furthermore, it must contain only at-rules, property names, and property values defined in this specification.
By default, the CSS validator checks style sheets against the grammar, properties and values defined in the CSS 2.1 specification, but other CSS profiles can be checked against by using the options. CSS is an evolving language, and it is considered by many that “CSS” is a single grammar (the one defined in the latest specification) with a number of properties and acceptable values defined in various profiles.In a future version of the CSS validator, the default behavior may be to check style sheets against that latest “CSS grammar” and the cloud of all standardized CSS properties and values.