Questions tagged [knowledge-graph]

For questions related to the concept of a knowledge graph, which is a knowledge base represented as a graph that accumulates and conveys knowledge of the real world, where nodes represent entities and edges represent relations between those entities.

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What are the differences between a knowledge base and a knowledge graph?

During my readings, I have seen many authors using the two terms interchangeably, i.e. as if they refer to the same thing. However, we all know about Google's first quotation of "knowledge graph&...
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0answers
17 views

Is graph embedding linear in its maintaining of graph geometry?

It is claimed that the main goal of graph embedding methods is to pack every node's properties into a vector with a smaller dimension, so node similarity in the original complex irregular spaces can ...
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0answers
13 views

knowledge data base or model for "terms" containment

I'm looking for an open source database/model that can tell me whether there's a relationship of containment between two general "terms", i.e "dresses" is contained within "...
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0answers
27 views

Sparse Multi-hot encoding and autoencoders

I'm working with graph neural networks. I have a large graph. Each node has 4 features [A,B,C,D]: 2 categorical with high cardinality: 86k (A) and 148k (B) different features 2 integer with ranges: [...
1
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1answer
46 views

What is meant by the rank of the scoring function here?

I've been reading this paper on Knowledge Graph Reasoning for Explainable Recommendation lately, and I don't understand a particular section: Specifically, the scoring function $f((r,e)|u)$ maps any ...
2
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1answer
73 views

Why can't pure KG embedding methods discover multi-hop relations paths?

According to Reinforcement Knowledge Graph Reasoning for Explainable Recommendation pure KG embedding methods lack the ability to discover multi-hop relational paths. Why is it so?
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1answer
83 views

Which reward function works for recommendation systems using knowledge graphs?

I've been reading this paper on recommendation systems using reinforcement learning (RL) and knowledge graphs (KGs). To give some background, the graph has several (finitely many) entities, of which ...
1
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1answer
65 views

What are multi-hop relational paths?

What are multi-hop relational paths in the context of knowledge graphs (KGs)? I tried looking it up online, but didn't find a simple explanation.