Prepare text representations
Collect item text (titles, summaries or full content), clean and normalise it, and convert to vector representations such as TF‑IDF or sentence embeddings.
Recommend by text similarity. Evaluate relevance and diversity.
Content recommendation based on text uses document representations (for example TF‑IDF or sentence embeddings) to compute similarity between items and suggest related content. Important concerns include canonicalising text, handling short descriptions, controlling popularity bias, and offering diverse recommendations rather than near-duplicates.
Learning concept · Not a validated service
Content recommendation based on text uses document representations (for example TF‑IDF or sentence embeddings) to compute similarity between items and suggest related content. Important concerns include canonicalising text, handling short descriptions, controlling popularity bias, and offering diverse recommendations rather than near-duplicates.
A proposed application: recommend related articles or learning modules to readers based on the textual content they are viewing. In a production system, human editors should review automated suggestions and a logging pipeline must capture feedback for retraining.
Collect item text (titles, summaries or full content), clean and normalise it, and convert to vector representations such as TF‑IDF or sentence embeddings.
Use cosine similarity on item vectors to form an item–item similarity matrix and identify top candidates for each item or user context.
Measure offline metrics such as precision@k, recall@k and diversity; manually inspect sample clusters for near-duplicates and topical drift.
Add business rules for freshness, diversity and content safety; implement fallback logic and a feedback loop to capture user interactions.
The supplied starter builds a small user–item ratings table, pivots it to a user-by-item matrix, computes cosine similarity between users and recommends items liked by the most similar user. It does not compute any text representations or use item text.
matrix = ratings.pivot_table(index="user", columns="item", values="rating").fillna(0)
user_similarity = pd.DataFrame(
cosine_similarity(matrix),
index=matrix.index,
columns=matrix.index,
)The starter operates on explicit user ratings and performs user-based collaborative filtering via cosine similarity; it contains no text preprocessing, no TF‑IDF or embedding step, and therefore does not implement the text-based recommendation described in the title.
A proposed extension: replace the ratings table with item text, vectorise items using TF‑IDF or a sentence-embedding model, compute item–item similarity and serve topically related content with diversity filters.
This is a potential application pathway, not a delivered product. The supplied starter does not implement this service or validate it with real users.
Networkers Home runs this topic inside its AI Engineer Course, with placement support and hands-on labs.