ElasticSearch (5) Excellent Blog or Example

Data Visualization on ES

http://www.elasticsearch.org/blog/2011/05/13/data-visualization-with-elasticsearch-and-protovis.html

 

Search Engine Indexing

http://en.wikipedia.org/wiki/Index_(search_engine)#Inverted_indices

 

 

Faceted Search

http://en.wikipedia.org/wiki/Faceted_search

 

Information Filtering and Information Retrieval 

http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.104.7500