Lucene Architecture

The DBpedia Spotlight Architecture is composed by the following modules:

• Web application, a demonstration client (HTML/Javascript interface) that allows users to enter/paste text into a Web browser and visualize the resulting annotated text.
• Web Service, a RESTful/SOAP? Web API that exposes the functionality of annotating and/or disambiguating entities in text.
• Annotation Java/Scala API, exposing the underlying logic that performs the annotation/disambiguation.
• Indexing Java/Scala API, executing the data processing necessary to enable the annotation/disambiguation algorithms used.
• Evaluation module, where we test disambiguators, log results and use those to train our system to perform better.

External dependencies:

• DBpedia Extraction Framework, (only for the index module) extracting the necessary data from the Wikipedia dumps.
• Lucene 3.6, providing the low level indexing framework used by DBpedia Spotlight.
• LingPipe 4.0.0, providing the string matching implementation used for the Spotter module.

System Requirements

• Java 1.7+
• Scala 2.9+
• Spotlight JAR
• Spotlight Library JARs
• Lucene disambiguation index
• Spotter dictionary
• large RAM to set the heap size big enough for the Spotter (approx. 8G)
• Maven 3 for the automatic installation of dependencies.
• Indexing Java/Scala API, executing the data processing necessary to enable the annotation/disambiguation algorithms used.