Hi Edwin, let's do this step by step. Clustering is problem solved by unsupervised machine learning algorithms. The scope of clustering is to group per similarity a corpus of documents, trying to have meaningful groups for a human being. Solr currently provides different approaches for *Query Time Clustering* ( also known Online Clustering). There's an out of the box integration that allows you to use clustering at query time on the query results. Different algorithms can be selected, mainly provided by Carrots2 .
This algorithms also provide a guess for the cluster name. Given this introduction let me see your problem. 1) The first part can be solved with a custom UpdateProcessor that will process the document and add the automatic new title. Now the problem is, how we want to extract this new title ? Honestly I can not understand how clustering can fit here … 2) Index time clustering is not yet provided in Solr ( I remember there was only an interface ready, but no implementation) . You should cluster the content before indexing it in Solr using a machine Learning library. Indexing time clustering is delicate. What will happen to the next re-Index ? Should we cluster everything again ? This topic must be investigated more. Anyway, let me know as the original problem maybe does not require the clustering. Cheers 2015-06-10 4:13 GMT+01:00 Zheng Lin Edwin Yeo <edwinye...@gmail.com>: > Hi, > > I'm currently using Solr 5.1, and I'm thinking of ways to allow the system > to automatically give the rich-text documents that are being indexed a > title automatically, instead of user entering it in manually, as we might > have to index a whole folder of documents together, so it is not wise for > the user to enter the title one by one. > > I would like to check, if it's possible to run the clustering, get the > results, and use the top score label to be the title of the document? > Apparently, we need to run the clustering prior to the indexing, so I'm not > sure if that is possible. > > > Regards, > Edwin > -- -------------------------- Benedetti Alessandro Visiting card : http://about.me/alessandro_benedetti "Tyger, tyger burning bright In the forests of the night, What immortal hand or eye Could frame thy fearful symmetry?" William Blake - Songs of Experience -1794 England
