You could also put a short representation of the data (I suggest days since 01.01.2010) as payload and calculate boost with payload function of the similarity.
>-----Original Message----- >From: ext Jason Brown [mailto:jason.br...@sjp.co.uk] >Sent: Montag, 29. November 2010 17:28 >To: solr-user@lucene.apache.org >Subject: Boost on newer documents > > >Hi, > >I use the dismax query to search across several fields. > >I find I have a lot of documents with the same document name (one of the >fields that the dismax queries) so I wanted to adjust the >relevance so that titles with a newer published date have a higher relevance >than documents with the same title but are older. Does >anyone know how I can achieve this? > >Thank You > >Jason. > >If you wish to view the St. James's Place email disclaimer, please use the >link below > >http://www.sjp.co.uk/portal/internet/SJPemaildisclaimer