[CWB] Regular expressions with word groups

[Josep M. Fontana]

Thanks Andrews and/or Andreses for your quick responses,

I have had problems with both of our suggestions. In principle I would 
like to use a single ! operator for the whole regular expression pattern 
rather than having to add it to every relevant subpattern.

But wherever I place the '!' i don't seem to get the desired results. 
So, if I do the following:

[(word="f[ei]rid.*")|(word="muert[ao].*")] !(([(pos="S.*") & 
(word="d.*")][word=".*el"][word="ca[buv]allo.*"])|[word="entierra"]|([word="en"][word="tierra"]))

one of the first hits I get is:

cayo*muerto*en tierra

This should be out because the last of the word groups that I have is 
([word="en"][word="tierra"]). Shouldn't the ! operator have scope over 
the last group as well?

Josep M.


> Hey Josep,
>
> I'm fairly sure you just use ! if you're not testing a specific 
> annotation. Place ! before the left parenthesis of the group you're 
> trying to test. So if you're trying to test the negation of that 
> entire group, just add ! to the front of it. See 2.6 in the CQP Tutorial.
>
> All the best,
>
> Andrew
>
>
>
> On Tue, Jul 28, 2020 at 11:15 AM Josep M. Fontana 
> <josepm.fontana at upf.edu <mailto:josepm.fontana at upf.edu>> wrote:
>
>     Hi,
>
>     I don't know whether this is the right forum to ask this
>     particular kind
>     of question but I figure there are enough people here with sufficient
>     experience to lend me a hand with this problem. If you cannot
>     answer the
>     question but you can point me to some other forum/group where I
>     can find
>     help, I would appreciate it.
>
>     So, I have the following regular expression to identify a set of
>     expressions that can appear in a particular position in the text.
>     What I
>     would like to do is to create the negation of this regular
>     expression.
>     That is, any string/expression/group of expressions that does NOT
>     contain the expressions in these groups.
>
>     I know how to use the != operator for a particular item (word, pos,
>     lemma) but where would one insert this operator to have scope over
>     the
>     whole group of expressions that match this pattern? Thanks in advance.
>
>     (([(pos="S.*") &
>     (word="d.*")][word=".*el"][word="ca[buv]allo.*"])|[word="entierra"]|([word="en"][word="tierra"]))
>
>
>     Josep M.
>
>
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