HTML and CSS Reference
In-Depth Information The scheme attribute
This attribute specifies the scheme to be used to interpret the property's
value. This scheme should be defined within the profile specified by the
profile attribute of the <head> tag. [ <head>, 3.7.1 ]
6.8.2. The <nextid> Header Element (Archaic)
This tag is not defined in the HTML 4 and XHTML standards and should
not be used. We describe it here for historical reasons.
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