path_hierarchy Aggregation search component

[valentinedwv]

Terminology is often in a hierarchy, but this is cannot be expressed as a simple keyword lists.

Sometimes metadata creators may express such paths in their keywords, eg Science Domain > Earth Sciences > Geology The HierarchyAggregation allows for the generation of tree widgets in the search panel to allow for searching of of such hierarchies.

This allows for the use of fields that have been indexed by the path_hierarchy analyzer

paths: Science Domain > Earth Sciences > Geology multiple root paths can be displayed seperately

[valentinedwv]

In progress: http://132.249.238.169:8080/geoportal/

branch: https://github.com/CINERGI/geoportal-server-catalog/tree/hierachy

[mhogeweg]

this is very cool. some thoughts: where is the hierarchy itself maintained? for example, in Europe there is the Gemet Multilingual Thesaurus that is referenced in INSPIRE metadata. would such a thesaurus be usable in the hierarchy?

The hierarchy choice counts appear to not be fully aligned with the current result set. It is possible to select some option in the hierarchy (with a count > 0) and then get no results.

[valentinedwv]

To index, it has to be inside the document.

Done two ways:

1. we put the path as the thesaurus name inside the iso document, then combine TN, and Keyword in the evaluator (categories_cat)
2. we call a REST service in the evaluator, and stuff full paths into the document (heirarchies_cat)

So for GMET, you would call a service (or some code embedded in geoportal cat), and add a path.

This could be used to prefix terms with thesuarus names, as an easier way create new search facets. May be other ways to do this, also. This is just the simplest.

[valentinedwv]

The hierarchy choice counts appear to not be fully aligned with the current result set. It is possible to select some option in the hierarchy (with a count > 0) and then get no results.

For some reason, two hierarchy filters == zero results

Looks like this occurs when the filters are on the portion of the tree. Category >Science Domain> Earth Science Category >Science Domain> Earth Science > Economic Geology

[mhogeweg]

Geoportal added the hierarchical search facet: https://github.com/Esri/geoportal-server-catalog/wiki/Configure-Hierarchical-Search-Facet