Testing the target format

With the command !ifdest you can test the destination format. Use the following abbreviations:

In addition to these abbreviations you can use all and none. A query with all always returns a true value, a query with none always returns a false value.

The following example shows how to set a special document title for Windows Help:

!ifdest [win]
!docinfo [title] The Windows Help to
!else
!docinfo [title] The guide to
!endif

The !ifndest command is related to !ifdest. But !ifndest will check if you do not convert to the given destination format. Thus you can write the upper example this way, too:

!ifndest [win]
!docinfo [title] The guide to
!else
!docinfo [title] The Windows Help to
!endif

You can pass more than one abbreviation to the query command. If you do so the query returns a true value if one or more abbreviations match the current destination format. The next example shows how to set a special document title for hypertext formats:

!ifdest [win,html,stg,htag]
!docinfo [title] The hypertext to
!else
!docinfo [title] The guide to
!endif