_UNIQUEWORDSALL — Returns the number of unique words in all files processed by the last call to WORDS.

Syntax:
%_UNIQUEWORDSALL

Counting unique words for all files requires WORDS to build a vocabulary list for all files processed; this list is not built by default. Unless you enable the omnibus vocabulary list with /U:2 or /U:3, this variable will return the value N/A.

Words that differ only in case are counted as the same word. In the phrase polish Polish furniture using Polish furniture polish, this plugin will find only three ‘unique’ words.

If the WORDS command has not been called, this variable returns the value N/A.