Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
The HTMLMetaElement.scheme property defines the scheme of the value in the HTMLMetaElement.content attribute. The scheme property was created to enable providing additional information to be used to interpret the value of the content property. The scheme property takes as its value a scheme format (i.e. YYYY-MM-DD) or scheme format name (i.e. ISBN), or a URI providing more information regarding the scheme format. The scheme defines the format of the value of the content attribute. The scheme content is interpreted as an extension of the element's HTMLMetaElement.name if a browser or user agent recognizes the scheme.
This property is deprecated and should not be used on new web pages.