Returns the name of an open index.


TAG([<.mdx filename expC>,] [<index number expN> [,<alias>]])

<.mdx filename expC>

The .MDX file that contains the index tag you want to check. The .MDX must be opened in the specified work area. If omitted, all open indexes, including the production .MDX file, are searched.

<index position expN>

the numeric position of the index tag in the specified .MDX file, or the position of the index in the list of open indexes.


The work area you want to check.


Unlike most functions, the first parameter is optional. If you omit the first parameter, the remaining parameters shift forward one; the second parameter becomes the first parameter, and so on.


TAG( ) returns the name of the specified index, either:

The tag name of an index in an .MDX file, or

The name of an .NDX file, without the file extension.

The index must be referenced by number. If you do not specify an .MDX file to check, index numbering in the list of open indexes is complicated if you have open .NDX indexes or you have open non-production .MDX files. For more information on index numbering, see SET INDEX.

If you do not specify an index tag, TAG( ) returns the name of the current master index tag, or an empty string if there is no master index.

If the specified .MDX file or index tag does not exist, TAG( ) returns an empty string.


No equivalent.