Digging in the Solr code: 5 minutes howto

How to quickly debug a custom Apache Solr component (e.g. request handler, query parser, filter) in your favourite IDE.
The example uses IntelliJ but it is valid for any IDE.

Towards a scalable Solr-based RDF Store

Towards a scalable Solr-based RDF Store

SolRDF (i.e., Solr + RDF) is a set of Solr extensions for managing (indexing and searching) RDF data. In a preceding post, I described how to set up a standalone SolRDF instance in two minutes; in this post, I’ll describe how to run SolRDF in a simple cluster. The required steps are similar to what […]

RDF in Solr: HowTo

RDF in Solr: HowTo

The Solr built-in UpdateRequestHandler supports several formats of input data. It delegates the actual data loading to a specific ContentStreamLoader, depending on the content type of the incoming request (i.e., the Content-type header of the HTTP request). Currently, these are the available content types declared in the UpdateRequestHandler class: application/xml or text/xml application/json or text/json application/csv or text/csv application/javabin So, a client has several options […]

Apache Solr: “Exact Match” BATH compliant field

exact match

If you want to expose a Z3950 interface for an Information Retrieval sooner or later you will meet the BATH profile, which is basically a set of rules that promotes standards behaviours between Z3950 servers. Aims of those specification is to determine a list of searches (fields, attributes) that should be supported by a Z3950 […]