Return type: String
Returns:       

The true name of the attribute.

  key of specified? attributes element-qualifier* [numeric-expression]

An operation that returns the "true" name of the attribute. This is most useful when retrieving the real name of an attribute being referenced through an alias. The name is uppercased when the SGML declaration specifies NAMECASE GENERAL YES for the SGML document being processed.

When key of is applied to attributes, the item indexer, [...], is required.

Because attributes are always considered part of a shelf of attributes, it always makes sense to ask for the "key" of an attribute, even if the attribute form is used rather than attributes.

Related Syntax    attribute    attributes    namecase general

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