Part-of-word matching challenge

Elastic Stack Elasticsearch
1

Hi,

We're looking for a way to match on part of words for single term queries but not all words.

For example (it's dutch):

  • searching for 'verlichting' should match on 'tuinverlichting' or 'wandverlichting' but
  • searching for 'pop' should NOT match on 'popular'
  • searching for 'bed' should match on 'beddengoed' or 'dekbedden' but NOT on 'bedrading' or bedrijf'

What is the best strategy?

Maarten

2

One method is to implement a word decompounding token filter for dutch language.

3

Hi,

Thanks for your reply. I've looked at https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-compound-word-tokenfilter.html#_dictionary_decompounder but the documentation is lacking.

I've tried, see https://gist.github.com/anonymous/f6f3067b02af50928751127a1e351e63
but somehow it does not work at all.

Maybe you can spot the errror? I'm using es 5.2.

Is this what you meant by the way?

Thanks,
Maarten

4

figured out the problem of decompounding, had to do because i put the quotes around the [ in stead of only the words. And in combination with stemmer_override i could manually override words for stemming i got better results.

5

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