Sunday, March 20, 2016

Endeca Basics : does Stemming change relevance ranking score?

Stemming feature allows expanding the search results from singular to plural and vice versa. Suppose, search term is "shoe", this... thumbnail 1 summary
Stemming feature allows expanding the search results from singular to plural and vice versa.

Suppose, search term is "shoe", this gives the result for "shoe" and "shoes" both.  Find out example below:-

Record -A 
DGraph.WhyDidItMatch: product.keywords: shoe (Exact,Substring/Phrase)
DGraph.WhyDidItMatch: product.longDescription: Perfect for a day at the beach or around town. Though simple in design, this is a great everyday shoe with cork heel for extra walking comfort during daily wear. (Substring/Phrase)

Record- B
DGraph.WhyDidItMatch: product.keywords: shoes (Stemming)
DGraph.WhyDidItMatch: product.longDescription: With a suit or with jeans, these shoes will be a hit in either case. Made of supple leather and with a rubber sole. (Stemming)

Both above records show, why did it match. Record-A got match based on exact match and Record-B based on stemming.

Relevance ranking of Endeca provides one of the modules "Interp", this module ranks the exact/phrase matched product always on top than stemming matched.

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