Language representation learning is an integral part of NLP systems, integrating factual knowledge about entities and relations helps to build better learning models.

Language Representation Learning

Knowledge graph helps to fetch facts for answering NLP based question answering systems.

  - Single-fact QA
 - Multi-hop Reasoning


Question Answering 

Intelligent recommendation systems can be made by integrating knowledge graph to get extra information.

Recommender Systems

The application of structured data in knowledge graphs are useful in applications like link prediction, entity prediction ,relation extraction ,question answering applications and recommendation systems. The various applications of knowledge graphs are  in 

 - Language Representation Learning
 - Question Answering 
 - Recommender Systems


San Jose State University

Research on knowledge graph are categorized into

 - Knowledge representation learning
 - Knowledge acquisition
 - Temporal knowledge graph
 - Knowledge -aware applications


Research on Knowledge Graph in NLP

A Survey on Knowledge Graphs: Representation, Acquisition and Applications

Knowledge representation learning(KRL) maps entities and relations onto a low dimensional vector space by capturing its semantic meaning. KRL is also called multi-relation learning or statistical relational learning. The recent advancement in distributed representation learning can be categorized into four scopes

 - Representation Space 
 - Scoring Function 
 - Encoding Models 
 - Embedding with Auxiliary Information


Knowledge Representation Learning /Knowledge Graph Embedding

Knowledge acquisition aims to build new knowledge graphs from structured ,semi structured and unstructured text. It also helps to complete existing knowledge graphs, discover and recognize entities and relations. Three categories of knowledge acquisition techniques are 

 - knowledge  graph completion 
 - entity discovery
 - relation extraction.


Knowledge Acquisition

Temporal knowledge graph takes consideration of  temporal knowledge into KRL and KGC. The different areas where temporal information accounted are

 - Temporal Information Embedding
 - Entity Dynamics 
 - Temporal Relational Dependency
 - Temporal Logical Reasoning 


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