"featvar" and "<lf><var ..."

  • Multimodal parsing

    Excuse me, what's the difference of "<featvar name="NUM"/>" and "<lf><var name="INFO"/></lf>", like in the following example, thanks

              <feat attr="num">
                <featvar name="NUM"/>
              <feat attr="info">
                  <var name="INFO"/>

    • Michael White

      Michael White - 2007-03-30

      LF-valued features may appear in the semantics.

  • Raveesh

    Raveesh - 2009-09-17

    What linguistic phenomena or requirements from grammar engineering view point necessitated having LF-valued syntactic features. As I have been discussing prosodic implementation with Mike, I see the usability of such features from this aspect. Were there other aspects? 

    Thanks, Raveesh

  • Michael White

    Michael White - 2009-09-17

    This design decision goes back to the earliest days.  I suspect it was to make it easier to handle features like number, where it isn't really necessary (there can be parallel syn and sem feats).

  • Raveesh

    Raveesh - 2009-09-21

    Hi Jason,

    Is there a provision for declaration and usage of LF-valued syntactic attributes in .ccg ?



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