1) this question is really more suited for the solr-user list (since it is a question about how to use a feature of solr)
... : I passing the synonym filter only at query time and have expand=true ... 2) please note the caveat about multiword synonyms on the wiki... http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#SynonymFilter >> Keep in mind that while the SynonymFilter will happily work with >> synonyms containing multiple words (ie: "sea biscuit, sea biscit, >> seabiscuit") The recommended approach for dealing with synonyms like >> this, is to expand the synonym when indexing. This is because there are >> two potential issues that can arrise at query time: >> >> 1. The Lucene QueryParser tokenizes on white space before giving any >> text to the Analyzer, so if a person searches for the words sea biscit >> the analyzer will be given the words "sea" and "biscit" seperately, and >> will not know that they match a synonym. >> >> 2. Phrase searching (ie: "sea biscit") will cause the QueryParser to >> pass the entire string to the analyzer, but if the SynonymFilter is >> configured to expand the synonyms, then when the QueryParser gets the >> resulting list of tokens back from the Analyzer, it will construct a >> MultiPhraseQuery that will not have the desired effect. This is because >> of the limited mechanism available for the Analyzer to indicate that >> two terms occupy the same position: there is no way to indicate that a >> "phrase" occupies the same position as a term. For our example the >> resulting MultiPhraseQuery would be "(sea | sea | seabiscuit) (biscuit >> | biscit)" which would not match the simple case of "seabisuit" >> occuring in a document -Hoss
