They may appear in any order. Attribute names are always case-insensitive.
Attribute values are generally case-insensitive.
This attribute behaves the same as the A NAME attribute in defining a destination within a document. Non-null alphanumeric strings under 256 characters in length. In addition to the specific attributes above, there are more generic attributes which have been organized into three separate categories. Trigger external or inline script code. Facilitate multi-language support.