Comments (9)
A patch for this issue.
Original comment by [email protected]
on 13 Jun 2011 at 6:41
Attachments:
from dkpro-core-asl.
I have had a look at the patch and it seems to work for German or English, but
I am not quite sure what the side effects will be for other languages.
Additionally, the opinions about what should be considered as punctuation might
differ.
Thus, I would rather suggest to implement this functionality as a subsequent
filtering step where all annotations (type of the annotation would be a
parameter) are removed that correspond to some pattern (another parameter).
Original comment by [email protected]
on 29 Sep 2011 at 10:09
from dkpro-core-asl.
I find it a bit strange that the patch looks at the last character of a token
to decide if a token should be removed or not.
In terms of alternatives, we have a TokenFilter in the tokit module that
currently filters out tokens that are too long. That, however, does not handle
attached POS or Lemma annotations.
There is also the StopWordRemover which is dictionary-based and is configurable
with respect to types.
Maybe it would be useful to merge all of that into a single AnnotationFilter
which can do regexes or dictionaries - or maybe even dictionaries of regexes?
;) For sake of speed separate parameters for max length and min length might
also be useful.
Original comment by richard.eckart
on 29 Sep 2011 at 10:19
from dkpro-core-asl.
> I find it a bit strange that the patch looks at the last character of a token
to
> decide if a token should be removed or not.
Indeed.
> Maybe it would be useful to merge all of that into a single AnnotationFilter
which
> can do regexes or dictionaries - or maybe even dictionaries of regexes? ;)
For sake
> of speed separate parameters for max length and min length might also be
useful
Sounds good. Do we aim at the whole thing (lists of dictionaries of regexes ;)
or better start small?
Original comment by [email protected]
on 29 Sep 2011 at 10:31
from dkpro-core-asl.
Changing from the dictionary-based to dictionary-of-regexes should be little
more a parameter (PARAM_REGEX = true) and switching from equals() to matches().
What's bugging me more is the question of how to deal with POS, Lemma, Stem and
so on. Traditionally these are co-located and there was no link in Token to
refer to them. But this is awkward for programming and bad for performance. So
since recently, the Token has explicit fields to refer to POS and Lemma and I
am not sure about Stem. It would be possible to override the removeFromIndex()
method in Token to automatically also remove associated POS. Lemma, Stems - but
this would only work for JCas. The other alternative is the mechanism used in
the StopWordRemover - works but is much slower and needs more configuration
effort. Maybe a combination of both would be good so that CAS-based AEs could
use the configurable method (that could become a convenience method in uimaFIT
CASUtil) and JCas-based AEs could call Token.removeFromIndexes() and Lemma, POS
and Stem are automatically cascaded.
What do you think?
Original comment by richard.eckart
on 29 Sep 2011 at 11:03
from dkpro-core-asl.
As far as I see, it would make the component quite dependent on our type
system, right.
This is not a problem in general, but I would prefer a type system agnostic
component, and maybe additionally a more specialized one.
Original comment by [email protected]
on 29 Sep 2011 at 12:25
from dkpro-core-asl.
What do you mean by "more specialized".
Original comment by richard.eckart
on 29 Sep 2011 at 6:50
from dkpro-core-asl.
Original comment by richard.eckart
on 8 Feb 2012 at 10:51
- Added labels: Milestone-1.4.0
from dkpro-core-asl.
Looks like this issue has been superseded by issue 14 (rename and enhance
tokenfilter). We won't change the BreakIteratorSegmenter because that would
imply we also need to change all other tokenizers that we have and may have in
the future.
Original comment by richard.eckart
on 7 Jun 2012 at 3:14
- Changed state: WontFix
- Added labels: Type-Enhancement
- Removed labels: Milestone-1.4.0, Type-Defect
from dkpro-core-asl.
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