I am confuse her but i want to clear my doubt. I think it is stupid question but i want to know. Use a TokenFilter that outputs two tokens (one original and one lowercased) for each input token. For queries, the client would need to expand any search terms containing upper case characters to two terms, one lowercased and one original. The original search term may be given a boost, although it may not be necessary given that a match on both terms will produce a higher score.

text:NeXT ==> (text:NeXT^10 OR text:next)

what this ^ mean here .

http://wiki.apache.org/solr/SolrRelevancyCookbook#Relevancy_and_Case_Matching