Validation is used to check data to make sure it fits whatever required specifications are set for it. Typically Validation is used in checking input data, and in verifying data before storage.

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16answers
2k views

HTML validation: is it worth it?

What are the advantages and disadvantages (if any) of making sure that all pages validate compared to having non-valid HTML that however works on all major browsers? Also, is having valid HTML after ...
5
votes
3answers
585 views

Validation Meta tags for search engines

Should validation meta tags for search engines be left on the site following validation? For example, should I leave my msvalidate meta tag after I've validated the site.
15
votes
8answers
415 views

Effective captcha solutions [duplicate]

Possible Duplicate: How can I prevent spam on sites which I control? ReCaptcha is all the rage at the moment, Based on customer/user feedback, what other captcha or general human ...
5
votes
4answers
1k views

Does valid HTML, CSS and/or XML affect SEO?

Can a page's HTML validity affect search engine optimization (SEO)? Assuming all other factors are exactly equal, will an HTML document with 0 errors and 0 warnings (W3C provides a tool to validate ...
15
votes
5answers
6k views

How can I validate HTML offline?

When I'm developing a website locally sometimes I want to check if the html is valid but I haven't been able to find a good tool. I want it partial as a sanity check when I'm troubleshooting layout ...