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Previously, we did not merge grouped hierarchal joins; however, because
of the way statements are compiled, we do need to merge OR-d positive
hierarchal joins, and ANDed negative hierarchal joins.
Also made some whitespace changes.
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Before statement compilation, empty filters are removed from group
filters, and childless group filters become empty filters.
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Previously, negative join filters were folded in with positive joins by
AND/ORing them together and negating the negative joins. Checking for
the existence of something that doesn't match a condition is different
from checking for the non-existence of something that does match a
condition, so now normalization considers positive and negative join
filters to be distinct classes of filters and does not fold them
together.
Also made some whitespace changes.
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The new object structure was designed to build on the existing WordNet
structure, while also adding in all of the data that we get from other sources.
More information about this can be found on the project wiki.
The generator has already been completely rewritten to generate a
datafile that uses the new structure. In addition, a number of indexes
are created, which does double the size of the datafile, but also allows
for much faster lookups. Finally, the new generator is written modularly
and is a lot more readable than the old one.
The verbly interface to the new object structure has mostly been
completed, but has not been tested fully. There is a completely new
search API which utilizes a lot of operator overloading; documentation
on how to use it should go up at some point.
Token processing and verb frames are currently unimplemented. Source for
these have been left in the repository for now.
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