Footnotes

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Martin Kay presented a similar generator at the MT workshop `Into the Nineties', Manchester, august 1989
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For the sake of simplicity the sample grammars will define very simplistic logical forms.
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Note that this does not imply that this daughter is the leftmost daughter; the information about the left-ro-right order of daughters is represented by the difference-list representation of strings in each node. Moreover note that this particular representation may be the result of some compilation step from a representation that is more conveniant for the rule writer
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It is not necessarily the case that this left recursion is caused by the leftmost daughter of a rule; the left recursion is caused by the node that is generated first. Thus the German and Dutch equivalents of the rule where the order of the head and the argument is switched present exactly the same problem.
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This may suggest that the relation between the antecedent and gap is now fully acounted for by this definition (as in for example Extraposition Grammars [15]); however in this solution the rulewriter is still responsible for the percolation of the verb second information in each rule.

Gertjan van Noord
Fri Nov 25 13:07:08 MET 1994