ChartTwice < Main

---+Grammar Engineering Frequently Asked Questions

---++One of my words is showing up in the chart twice.  Why?

This situation can arise if you have a multi-word lexical entry, and another lexical entry for just part of the multi-word, for example:

<verbatim>
bastille-day := noun-lex &
  [ STEM < "bastille", "day" >,
    SYNSEM.LOCAL.LKEYS.KEYREL "_bastille_day_n_rel" ].

day := noun-lex &
  [ STEM < "day" >,
    SYNSEM.LOCAL.LKEYS.KEYREL "_day_n_rel" ].
</verbatim>

If you try to parse a sentence with _Bastille Day_, the LKB will find lexical entries for both _Bastille Day_ and _day_ and put them both in the chart.  Unless you also have an independent lexical entry for _Bastille_, the entry for just _day_ won't be included in any complete parses, but the algorithm doesn't know this.

---

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-- EmilyBender - 02 Nov 2004

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Topic revision: r1 - 2004-11-03 - TWikiGuest