Searching within words
Let's assume thay you have multiple indexed pages containing the word "ultraviolet". However, you would like to return this document when a user only searches for "ultra" or "violet".
This can be achieved by creating a new Analyzer, and applying this Analyzer to a new field of the schema.
The Analyzer will use the Ngram filter to derive multiple new words from the existings ones:
A new field must then be created. It will take its value from the existing content field and will use the new NgramAnalyzer on this content.
The content must now be re-indexed, and the new mega_content field must be added to the fields searched by the query.