A tag has to go the header, not the body of a page, and it has a limited number of accepted values.
To include arbitrary data for use in other parts of the page you could use the “data” attribute, which will pass validation.
E.g.
A tag has to go the header, not the body of a page, and it has a limited number of accepted values.
To include arbitrary data for use in other parts of the page you could use the “data” attribute, which will pass validation.
E.g.