abstract

Generate an abstract. The syntax is

   abstract(text[, maxsize[, style[, query]]])

This function will produce an abstract of the supplied text. It takes between 1 and 4 parameters. The first parameter is the text to abstract. The second parameter is the maximum size of the abstract. The default is 230 characters, which can also be given as 0. The third and fourth arguments are used to control the behaviour of the abstractor. The fourth argument is an optional query, which if supplied will cause the engine to center on the best match for the specified query. The third argument is used if there is no query, and specifies whether to start the abstract at the beginning of the document, with a value of zero, or the default value of 1 which will be smarter in most cases about where to start.

     SELECT     abstract(STORY, 0, 1, 'power struggle')
     FROM       ARTICLES
     WHERE      ARTID = 'JT09115' ;