=begin

= NAME

rast-search - Search documents from Rast database.

= SYNOPSIS

rast-search [options] query Rast-database...

= DESCRIPTION

rast-search searches documents with query from database.

rast-search searches documents from specified all database and
displays merged search result if more than one database specified.

= OPTIONS

: --sort=PROPERTY

  Set a sort property to PROPERTY. The default sort property is score.

: --ascending

  Sort in ascending order

: --descending

  Sort in descending order.

: --start-no=NUMBER

  Set first result item to NUMBER. The default number is 0.

: --num-items=NUMBER

  Set number of result items to NUMBER. rast-search displays all
  result item if there is no specification.

: --summary-nchars=NUMBER

  Set summary length to NUMBER. The default summary length is 100.

: -h, --help

  Show this message.

: -v, --version

  Show Rast version.

=end