topic Re: Lucene and stop words in Alfresco in Alfresco Archive

Lucene and stop words in Alfresco

hbf — Sun, 30 Dec 2007 14:19:01 GMT

Dear list,Suppose I have a text document in Alfresco containing the phrase "time is money". I want users to be able to enter "money is time" and find the document. That is, I want to find all documents that contain all the words the user enters, in any order.Reading Alfresco's Search documentation I

Re: Lucene and stop words in Alfresco

hbf — Sun, 30 Dec 2007 14:42:39 GMT

(For those who need a temporary fix (like me): the stop-words Alfresco is using seem to be in file AlfrescoStandardAnalyser.java. My code reads them and drops all stop-words from the query. Not nice, but works.)

Re: Lucene and stop words in Alfresco

andy — Mon, 28 Jan 2008 16:31:52 GMT

Hi

Alfresco supports the standard lucene query syntax so you can write proximity queries (but not span queries). See http://lucene.apache.org/java/2_1_0/queryparsersyntax.html#Proximity%20Searches

Andy

Re: Lucene and stop words in Alfresco

hbf — Mon, 28 Jan 2008 16:44:38 GMT

Hm, thanks for the hint, Andy, it seems to me, however, that this does not solve the problem entirely.

If you want to create a custom "Advanced Search" page for Alfresco where they can enter arbitrary words (see my examples in the previous post), you are forced to know the stop word list (from AlfrescoStandardAnalyser). That creates a dependency which is not nice at all.

I use Alfresco as the backend engine for a CMS, so I find myself exactly in this situation. Assuming I am not the only who will/does do something like this, do you want me to open a JIRA for this?

Regards,
Kaspar

Re: Lucene and stop words in Alfresco

andy — Thu, 07 Feb 2008 17:04:18 GMT

Hi

You could use a customized version of the analayser and set an empty stop word list. This way there will be no stop words. It is a simple wrapper class and change to the tokenisation config.

Andy