Table 3. Comparison between Open Semantic Search and ElasticSearch.

	Open Semantic Search	ElasticSearch
Visualization	1. Visualizing like trend charts, word clouds, interactive maps 2. graph/network analysis view 3. Alternatively, enable the Open Source ETL plugin for integration with the Neo4J database and present visualization with Neo4j browser by Cypher graph query language.	via Kibana(Pie, Bar, Map, etc)
Builtin UI Features	Solr-PHP-UI	Search UI
Full source on Github	Yes	Yes
Frontend Technology	Browser	HTTP web interface
Storage Technology	Inverted Index	Inverted Index
Native RDF	native graph storage for graphs including RDF triple stores	index RDF data in JSON format
RDF Export (Only for editor)	Yes Yes	No
Builtin OWL import	Yes	No
SPARQL Support	Neo4j has Cypher that covers the need for a structured graph query language	Elasticsearch provides a full Query DSL (Domain Specific Language) based on JSON to define queries