Search by "sentence"

[thomaskrause]

Many users want to search treebanks with the context "sentence". Unfortunately the annotation that marks sentences is arbitrary (e.g. cat="S", cat="ROOT", seg="sent"...)

To make sentence search possible, we must be able to configure for each corpus (e.g. in the resolver) the annotation name which marks sentences. When sentence-based searching is activated, this annotation is then automatically added to the search as follows:

sentence-anno: cat="ROOT"
original AQL: cat="NP" & "Hund" & #1 > #2
modified AQL: cat="NP" & "Hund" & #1 > #2 & cat="ROOT" & #3 _i_ #1

The modified AQL is not displayed in the AQL box but sent in the background. Context is automatically set to zero on both sides when sentence-based search is enabled. There should be a checkbox to enable this called something like:

"Search for whole sentences (where available)"

This checkbox can be hidden by the admin if no corpora in the current instance support sentence-based searching.

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Imported from Launchpad using lp2gh.

• date created: 2011-06-09T09:05:53Z
• owner: krause
• the launchpad url was https://bugs.launchpad.net/bugs/794922

[thomaskrause]

(by krause)
Since we now support multiple segmentation we could also add artificial "sentence" segmentations with a Pepper manipulator and use this information. Since you can use the segmentation layer in the context stuff like "show me the match + 2 sentences left and right" would be possible.

[amir-zeldes]

Yes, segmentations solve this issue from a technical standpoint. It would still be a good idea to integrate this into the interface though: if a corpus flags one of its segmentations as 'sentence' (e.g. in corpus.properties), then a check box 'search for sentences' becomes available. Its function would be to serve as a shortcut for the settings: context segmentation = sentence_seg_name, context left/right = 0.