When you talk about indexing emails are you indexing Outlook mails? We have only found a few libraries that will do this and all require Outlook to be online at the time i.e. you cannot index PST files standalone.
As far as indexing goes index each address in a separate un-tokenized field not space delimited in a single field. It is also useful to put the To; CC and BCC in a single field to enable you to search to email you have sent to a person. I would also recommend you do some processing on the Subject field to remove FW and RE this will allow you to search by subject and pick up all emails in the thread. Mike -----Original Message----- From: Michael Wechner [mailto:[EMAIL PROTECTED] Sent: 19 June 2006 08:21 To: java-user@lucene.apache.org Subject: Re: indexing emails Rob Staveley (Tom) wrote: > Having spent a lot of time getting this wrong myself in an e-mail > indexer(!), I urge you to consider whether in your query interface you will > need to look for mail to "john*" rather than [EMAIL PROTECTED], because "john*" > may have been addressed to [EMAIL PROTECTED] or [EMAIL PROTECTED] If you index > only [EMAIL PROTECTED] (untokenised) you will have to use a PrefixQuery to look > for "john*", and you are liable to hit BooleanQuery.TooManyClauses problems, > if you have more than 1024 (or BooleanQuery.getMaxClauseCount()) e-mail > addresses in your index starting with "john". > > I'm trying to figure out a good design for this now for my own e-mail > indexing application, btw, is your code available somewhere, I mean as Open Source ;-) ? Thanks Michi > considering also whether I should cater for searches > for "*smith*". I'm coming round to the realisation that WildCardQuery and > PrefixQuery are not great things to depend upon for getting e-mail addresses > from an index and the right thing to do is to break the address up into > natural tokens ('.' or '-') in one field and leave them intact in another > field. It isn't ideal; e-mail addresses with no separator between initials > or first names and last name still need a PrefixQuery or WildcardQuery, if > you want to search for last names, but it does make some queries possible > which would otherwise blow up. > > -----Original Message----- > From: karl wettin [mailto:[EMAIL PROTECTED] > Sent: 16 June 2006 21:13 > To: java-user@lucene.apache.org > Subject: Re: indexing emails > > On Fri, 2006-06-16 at 15:20 -0400, Michael J. Prichard wrote: > >> I am working on indexing emails and want to have a "to" field. I am >> currently putting all the emails on one line seperated w/ >> > spaces...example: > >> [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] >> >> Then i index that with a StandardAnalyzer as follows: >> >> doc.add(new Field("to", (String) itemContent.get("to"), >> Field.Store.YES, Field.Index.UN_TOKENIZED)); >> >> Question is...is this the best way to do it? I want to be able to >> search for [EMAIL PROTECTED] and pick out just those Documents, etc. >> > > You can either do it as above (but you want to TOKENIZE the field) or you > could create a new UN_TOKENIZED field for each email address. > > The second will require less CPU as it does not involve any lexical > analysis. It will also create larger distance between the addresses in the > index (see span queries and term positions). > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > -- Michael Wechner Wyona - Open Source Content Management - Apache Lenya http://www.wyona.com http://lenya.apache.org [EMAIL PROTECTED] [EMAIL PROTECTED] +41 44 272 91 61 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
