Solr Spellchecker internals (now with tests!)

Solr Spellchecker internals (now with tests!)

Emmanuel Espina says:

But today I’m going to talk about Solr SpellChecker. In contrast with from google, Solr spellcheker isn’t much more than a pattern similarity algorithm. You give it a word and it will find similar words. But what is interpreted as “similar” by Solr? The words are interpreted just as an array of characters, so, two words are similar if they have many coincidences in their character sequences. That may sound obvious, but in natural languages the bytes (letters) have little meaning. It is the entire word that has a meaning. So, Solr algorithms won’t even know that you are giving them words. Those byte sequences could be sequences of numbers, or sequences of colors. Solr will find the sequences of numbers that have small differences with the input, or the sequences of colors, etc. By the way, this is not the approach that Google follows. Google knows the frequent words, the frequent misspelled words, and the frequent way humans make mistakes. It is my intention to talk about these interesting topics in a next post, but now let’s study how solr spellchecker works in detail, and then make some tests.

Looks like a good series on the details of spellcheckers.

Useful if you want to incorporate spell-check in a topic map application.

And for a deep glimpse into how computers are different from us.

Leave a Reply

You must be logged in to post a comment.