: Just wanted to check if there is more documentation about function queries : besides the java doc at : http://lucene.apache.org/solr/api/org/apache/solr/search/QueryParsing.html#parseFunction(java.lang.String,%20org.apache.solr.schema.IndexSchema)
unfortunately no, but please feel free to add some to the wiki or submit a Jira path to improve the javadocs :) : Starting with what the fields for all the functions mean: : eg. recip(myfield,1,2,3) they corrispond directly to the constructor args for the corrisponding ValueSource implementations... http://lucene.apache.org/solr/api/org/apache/solr/search/function/ValueSource.html : I am working towards getting to a function which combines a document's : popularity, recency & relevance. a reciprical function wrapping a reverse ordinal function tends to work well for rewarding recency (allthough keep in mind it rewards relative ordering of docs, not strict date base recency because it's using hte ordinal value) popularity can be incorporated with a simple linera function on your numeric field (assuming you store popularity as a "bigger==better" number. -Hoss
