mlsanityData to 7 Oct 2026

RAGEAR: Retrieval-Augmented Graph-Enhanced Academic Recommender

arXiv 2605.26819 ↗First posted 26 May 2026cs.IR cs.AIcited by 0

On the map: Retrieval-augmented generation → RAG for recommendation

Abstract (arXiv)

We present RAGEAR (Retrieval-Augmented Graph-Enhanced Academic Recommender), a neurosymbolic recommender system for academic course recommendation. RAGEAR combines dense retrieval over full lecture transcripts with a symbolic Knowledge Graph modelling courses, lessons, transcript chunks, credits, study plans, and curricular information. The Knowledge Graph supports symbolic filtering and contextualisation based on structured constraints, such as credits, academic disciplines, study plans, and prerequisites. Unlike metadata-based approaches, it exploits fine-grained instructional content by retrieving transcript chunks semantically aligned with a student's query. The main contribution is a graph-aware aggregation function that propagates chunk-level evidence to course-level recommendations. The score combines three factors: the share of retrieved similarity associated with a course, the rank-based strength of its relevant chunks, and the distribution of evidence across lessons. We evaluate RAGEAR on 152 student-like queries through a human evaluation sample and a large-scale LLM-based relevance assessment. Results show that lecture transcripts improve over metadata-only retrieval, and that RAGEAR further improves ranking quality over a transcript-based normalized SumP baseline, especially for top-ranked recommendations.

Key facts. No citing papers in the map yet (data through 7 Oct 2026). Placed in RAG for recommendation, one of 15 directions in Retrieval-augmented generation. Builds on 4 of its 22 references that are in the map. First posted on arXiv 26 May 2026.

Builds on

4 of 22 references.

References · 4

  1. 2022Robust Speech Recognition via Large-Scale Weak Supervisioncited by 3,972
  2. 2024Multilingual E5 Text Embeddings: A Technical Reportcited by 357
  3. 2019Deeper Text Understanding for IR with Contextual Neural Language Modelingcited by 111
  4. 2024Helping university students to choose elective courses by using a hybrid multi-criteria recommendation system with genetic optimizationcited by 3

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  1. 2024From Interests to Insights: An LLM Approach to Course Recommendations Using Natural Language Queries
  2. 2025TutorLLM: Customizing Learning Recommendations with Knowledge Tracing and Retrieval-Augmented Generation
  3. 2025Leveraging Graph Retrieval-Augmented Generation to Support Learners' Understanding of Knowledge Concepts in MOOCs
  4. 2025KERAG_R: Knowledge-Enhanced Retrieval-Augmented Generation for Recommendation
  5. 2025Ken Utilization Layer: Hebbian Replay Within a Student's Ken for Adaptive Exercise Recommendation
  6. 2026X-KGRank: A Knowledge Graph RAG Framework for Explainable Recommendations via Pattern Mining and LLM Re-Ranking
  7. 2025G-Refer: Graph Retrieval-Augmented Large Language Model for Explainable Recommendation
  8. 2025LlamaRec-LKG-RAG: A Single-Pass, Learnable Knowledge Graph-RAG Framework for LLM-Based Ranking