Defines maximal excerpt length.
When building excerpts for presenting a document in search results (using either Cached Copy or the body section of the document, or the original document), search.cgi returns a text not longer than ExcerptSize.
The default value is 256.
DateFormat, ExcerptPadding, ExcerptStopword, HlBeg, HlEnd, Locale, PagesPerScreen, UseLocalCachedCopy.