資料來源 : Free On-Line Dictionary of Computing

RL
     
        (MUD community) Real Life.
     
        "Firiss laughs in RL" means that Firiss's player is laughing.
     
        Opposite: {VR}.
     
        [{Jargon File}]
     
        (1995-05-09)

rl
     
        Kent Wittenburg .
     
        The RL files contain code for defining {relational grammar}s
        and using them in a bottom-up parser to recognise and/or parse
        expressions in Relational Languages.
     
        The approach is a simplification of that described in
        Wittenburg, Weitzman, and Talley (1991), Unification-Based
        Grammars and Tabular Parsing for Graphical Languages, Journal
        of Visual Languages and Computing 2:347-370.  This code is
        designed to support the definition and parsing of Relational
        Languages, which are characterised as sets of objects standing
        in user-defined relations.
     
        Correctness and completeness is independent of the order in
        which the input is given to the parser.  Data to be parsed can
        be in many forms as long as an interface is supported for
        queries and predicates for the relations used in grammar
        productions.
     
        To date, this software has been used to parse recursive
        pen-based input such as math expressions and {flow chart}s; to
        check for data integrity and design conformance in databases;
        to automatically generate constraints in drag-and-drop style
        graphical interfaces; and to generate graphical displays by
        parsing relational data and generating output code.
     
        requires:	Common Lisp
     
        ports: Allegro Common Lisp 4.1, Macintosh Common Lisp 2.0
     
        {(ftp://flash.bellcore.com/rl/)}.
     
        (1992/10/31)