The Remove unclassified values option allows administrators to blacklist all values not listed in a vocabulary, as in the following example:
In all documents about gazelles, several values are set for the keyword metadata key:
|Gazelle Etymology and Name||mammalia||Middle-East|
|Gazelle Species||Africa||viviparous animal|
|Gazelle Prehistoric Extinctions||viviparous||africa|
The keywords related to the type of animal are useful.
On the other hand, the keywords referring to a geographical location do not add significant value.
If documents are published as is, keyword facet values are displayed in Fluid Topics as follows:
In the image above, several keyword values are displayed, but not all of them are pertinent.
It is possible to use the Enrich and Clean feature and its Remove unclassified values option to clean and filter facet values as follows:Create a new Vocabulary named keyword_clean to clean the keyword Mammal by applying the following synonyms:
- Mammal=(mammal, mammalia, viviparous, viviparous animal)
The following screenshot shows how keyword facet values are displayed in Fluid Topics.
Although Mammal was cleaned, Fluid Topics still displays the information about geographical location.
In the Fluid Topics Enrich and Clean interface, check the Remove unclassified values option for keyword metadata.
As the "Africa", "africa", and "Middle-East" values are not mentioned in the keyword_clean vocabulary, Fluid Topics ignores them when creating the facet.
The following screenshot shows how a Keywords facet is cleaned, filtered and displayed in Fluid Topics:
Fluid Topics displays only the most relevant information.