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How are facets used in a search query?
Facets are dynamic and returned on a query. Search responses bring with them the facet categories used to navigate the results. If you aren’t familiar with facets, the following example is an illustration of a facet navigation structure.
How are facet filters used in search apps?
Faceted navigation is used for self-directed filtering on query results in a search app, where your application offers UI controls for scoping search to groups of documents (for example, categories or brands), and Azure Cognitive Search provides the data structure to back the experience.
How are facets used in azure Cognitive Search?
One of the challenges with facet navigation in Azure Cognitive Search is that facets exist for current results only. In practice, it’s common to retain a static set of facets so that the user can navigate in reverse, retracing steps to explore alternative paths through search content.
How to generate a facet from a constraint?
To generate facets from a constraint and include them in your search results, set the facet XML attribute or JSON property to true on a constraint definition in your search options. For example: For more details, see Appendix: Query Options Reference.
When to use facets in a location field?
Facets work best on fields with low cardinality. Due to the resolution of geo-coordinates, it is rare that any two sets of co-ordinates will be equal in a given dataset. As such, facets are not supported for geo-coordinates. You would need a city or region field to facet by location.
Is the JSON facet API part of the request API?
UPDATE: The JSON Facet API is now part of the JSON Request API, so a complete request may be expressed in JSON. Some of the ease-of-use enhancements over traditional Solr faceting come from the inherent nested structure of JSON. And here is the equivalent faceting command in the new JSON Faceting API:
When to use parallel selection in facet search?
The Parallel Selection approach works well when search is quite slow and a probability of complex selection (many options) is high. For parallel selection, you can face the problem of dependent facets. Some combinations of the facet values would return no results, and you need to mark those in the form somehow.
How are facets calculated in a search corpus?
Facets can be calculated over single value fields as well as collections. Fields that work best in faceted navigation have low cardinality: a small number of distinct values that repeat throughout documents in your search corpus (for example, a list of colors, countries/regions, or brand names).
How to add category to a facet filter?
The following code snippet adds category to the filter if a user selects a value from the category facet. If the user clicks on a facet value for a collection field like tags, for example the value “pool”, your application should use the following filter syntax: $filter=tags/any (t: t eq ‘pool’)
How to use facet filters for search navigation?
Developers who want static facets typically work around the limitation by issuing two filtered queries: one scoped to the results, the other used to create a static list of facets for navigation purposes.
When to use a filter expression in facet?
When the end user clicks on a facet value, the handler for the click event should use a filter expression to realize the user’s intent. Given a category facet, clicking the category “motel” is implemented with a $filter expression that selects accommodations of that type.