Inside the YJTOON Catalog: 185 Datasets, 27 Categories

The catalog is larger than most people expect from a hobby-scale project: 27 categories and 185 datasets, each available in JSON, YAML, and TOON.

Where the density is

• Programming & web — programming-languages (10), web-technologies (9), http-status-codes (10), css-layout-systems, typescript-type-system, javascript-es6-features.
• Systems & infrastructure — unix-commands (9), operating-systems, networking, cloud-computing, devops, cybersecurity, database-types.
• Computer science — data-structures (10), algorithms, design-patterns, ai-ml-terms (10).
• Science & math — mathematics, physics, chemistry, biology, astronomy, statistics-basics.
• Humanities — history, geography, economics, philosophy, literature, linguistics, psychology, law.

How to browse without the UI

The whole catalog is machine-readable from three files:

• /static-data/categories.json — categories with dataset counts
• /static-data/category/{slug}.json — per-category dataset lists
• /static-data/search-index.json — a flat search index

An agent that loads categories.json once has a map of everything the site offers. Fetching a full category JSON gives titles, descriptions, and tags without touching the database.

What a dataset looks like

Every dataset has a header (slug, title, description, category, tags, timestamps) plus a data object. The data is flat, tabular, and column-named for search — no nested surprises.

Browse by category, search by keyword, or pull the index and decide in one request. The catalog is the API's documentation.