Graph representation learning (GRL) automates feature engineering by converting nodes, edges, and subgraphs into dense numerical embeddings. These vectors preserve useful structural and semantic properties, making graph data consumable by standard machine-learning algorithms. section 11.0
A practical GRL pipeline typically involves:
- Encode graph structure and node attributes into vector representations. section 11.0
- Choose positional embeddings for global structure or structural embeddings for local patterns. section 11.8
- Apply the embeddings to downstream tasks such as node classification, link prediction, or community detection. section 11.0
- Use GNN message passing to aggregate and transform neighboring-node information across layers. section 11.8
Embedding approaches
Traditional graph embedding reduces dimensionality; Node2Vec captures meaningful node relationships; GNNs learn task-relevant features from graph structure and attributes. section 11.1
