[developers] tsdb result file

[Stephan Oepen]

hi bart,

> as an addition to a mail I sent earlier (see below), I also noticed
> that in my grammar, sometimes the root node shows up twice.
> 
> For example:
> 
> 179 at 2@-1 at -1@-1 at -1@-1 at -1@-1 at -1@(root-np (89 gen-mod -0.0177179 0 3
> (root-np (88 empty-det -0.00710798 0 3 (87 n-post-h-a -0.0 179944 0 3
> [...]
> 
> In this case, it's a small inconsistency in my grammar, but I suppose
> this shouldn't happen? It was generated using PET's -tsdbdump command.

  [...]

> === 2 dec 2008 ===
> 
> I was looking at the result file in tsdb profiles, and I saw that in
> some parses the root condition is included in the parse tree, and in
> some parses it isn't.

  [...]

thanks for the bug report.  i finally got around to looking into this,
and there actually were two bugs in PET related to printing of roots:
(a) the output of a root was not conditioned on looking at the top of a
derivation, i.e. whenever a result edge (with a non-empty root) occured
as part of a larger derivation (by virtue of a unary rule), the larger
structure would print with a spurious embedded root.  (b) in unpacking,
whether selective or exhaustive, the recording of roots on `new' edges
(those unpacked from a root-level edge) was flawed.

i have just checked in the code fixes to PET (into the `cm' branch) and
put a new `tcheap' binary into the LOGON tree.  would you have time to
test the new binary against Cheetah?

                                                      all best  -  oe

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