Excuse me, what's the difference of "<featvar name="NUM"/>" and "<lf><var name="INFO"/></lf>", like in the following example, thanks
LF-valued features may appear in the semantics.
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?
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).
Is there a provision for declaration and usage of LF-valued syntactic attributes in .ccg ?
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