blog post describes a mechanism to add keyword from thesaurus as queryable #14
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tomkralidis
requested changes
Aug 18, 2024
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| ## Populate the parameter from record imports | ||
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| We have 2 options here, either manage the population of the column within the database as part of an insert trigger on the `record.themes` field. Alternatively update `pcsw/core/metadata.py` so the column is populated when records are imported. |
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pcsw/core/metadata.py -> pycsw/core/metadata.py
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| title: Keywords from thesaurus as Queryable | |||
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title: Using keywords from a thesaurus as queryables
| publish_date: 2024-09-18 14:59:00-0400 | ||
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| ## Keywords from thesaurus as Queryable |
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Using keywords from a thesaurus as queryables
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| A common convention in catalogues is the use of keywords from a dedicated thesaurus. The assignment of these keywords can then later be used to filter or query the catalogue by these terms. To achieve this use case in pycsw, some configuration needs to be tailored. This blog post indicates the changes needed for this scenario. | ||
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| For this example we'll use a keyword from the [INSPIRE Themes](http://inspire.ec.europa.eu/theme) thesaurus. We will define a new queryable `inspiretheme`, which will be populated with the relevant keyword (if present). |
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| Which of the parameters are queryable is defined in `pycsw/core/repository.py`. | ||
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| 'inspiretheme': self.dataset.inspiretheme, |
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Wrap in a python code block/fence:
'inspiretheme': self.dataset.inspiretheme,|
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| ## Add parameter to record results? | ||
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| Keywords are already published in records, so there is generally no need to extend the record with the new parameter. If needed you can do so in `pycsw/ogc/api/records.py#Line=1150`. |
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If needed you can do so in pycsw/ogc/api/records.py#Line=1150. -> If needed you can do so in pycsw/ogc/api/records.py (line 1150).
| t.thesaurus['uri'] == 'http://inspire.ec.europa.eu/theme')))])) | ||
| ``` | ||
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| ## Add parameter to OGCAPI - Records facets |
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Add parameter to OGCAPI - Records facets -> Add parameter to OGC API - Records facets
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| ## Add parameter to OGCAPI - Records facets | ||
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| Facets enable to further limit search results. Keywords from thesauri are very usefull to add as facet. Add the paremeter to `default.yml`. |
tomkralidis
approved these changes
Aug 18, 2024
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Thanks @pvgenuchten ! Now published to https://pycsw.org/2024/08/18/keyword-from-thesaurus.html |
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