[GeoNetwork-devel] Exact Match queries in geonetwork search

GeoNetwork GeoNetwork Developer
, , ,
1

Hi All,

A user of GeoNetwork 3.10 has come to me asking why when they do a
search for a phrase in the standard search, eg for a record title, the
exact title is not the first result to be returned, even if the
results are ordered by relevance. You can see this happening here:
https://spatialdata.gov.scot/geonetwork/srv/eng/catalog.search#/home
if you search for "Community Council Boundaries - Scotland" (I have
tested this with and without the '-' in the record title). We've tried
adding quotes around the title in the search but nothing seems to
work.

I have looked into the documentation here:
https://geonetwork-opensource.org/manuals/trunk/en/customizing-application/configuring-search-fields.html#
and I understand that it's being tokenised, but I'm confused why the
exact title match isn't seen as the first most relevant result- it
feels as if it should be?

If that's not the expected behaviour, is there anything I do in the
lucene configuration to get the desired result?

Thanks

Jo

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Jo Cook
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2

Hi Jo

About relevance, note that by default it’s searched in a special field named any, that contains all the metadata text, so it’s not possible to give higher score to results having the text in the title or other specific fields.

It’s possible to improve this, but requires some changes in UI and lucene configuration. I add here summarized steps:

  1. Configure title or other fields to boost with a boost higher than 1:

https://github.com/geonetwork/core-geonetwork/blob/master/web/src/main/webapp/WEB-INF/config-lucene.xml#L298

  1. Change the search field to use in the search to use both any and the title field, with the format title_OR_any, that should search in both fields and with previous configuration boost results with the text in the title.

https://github.com/geonetwork/core-geonetwork/blob/master/web-ui/src/main/resources/catalog/views/default/templates/searchForm.html#L16

data-ng-model=“searchObj.params.title_OR_any”

https://github.com/geonetwork/core-geonetwork/blob/master/web-ui/src/main/resources/catalog/views/default/module.js#L197

$location.path(‘/search’).search({‘title_OR_any’: any});

https://github.com/geonetwork/core-geonetwork/blob/master/web-ui/src/main/resources/catalog/views/default/templates/home.html#L23

data-ng-href=“#/search?title_OR_any={{homeAnyField}}”>

  1. Restart / reindex

Regards,
Jose García

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Vriendelijke groeten / Kind regards,

Jose García


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3

Hi Jose,

Thanks for this- it’s exactly what I’m after. I will test out your changes and get them deployed.

Thanks again,

Jo

···

Jo Cook
t:+44 7930 524 155/twitter:@archaeogeek
Please note that currently I do not work on Friday afternoons. For urgent responses at that time, please visit support.astuntechnology.com or phone our office on 01372 744009

4

Hi Jose,

I think I have this working for searches made from the search tab, but not for searches made from the contribute tab. I have edited https://github.com/geonetwork/core-geonetwork/blob/master/web-ui/src/main/resources/catalog/templates/editor/editorboard.html#L27 to also use “searchObj.params.title_OR_any” but now nothing seems to happen when I run a search, which makes me think I’ve got it wrong, OR that there’s some javascript to change as well?

Thanks

Jo

···

Jo Cook
t:+44 7930 524 155/twitter:@archaeogeek
Please note that currently I do not work on Friday afternoons. For urgent responses at that time, please visit support.astuntechnology.com or phone our office on 01372 744009