According to HTML 5.1 CR, `an attribute value is a string` and `attribute values on HTML elements may be any string value`. The term html-`custom-attribute` is used to distinguish "any-string"-attributes from explicitly listed Global attributes in the HTML standard.
According to HTML 5.1 CR an attribute value is a string and attribute values on HTML elements may be any string value. The term html-custom-attribute is used to distinguish "any-string"-attributes from explicitly listed Global attributes in the HTML standard.
 
    