Small, clean, machine-readable reference datasets on language learning, imaging, family travel and everyday topics. Every dataset ships as JSON and is also published as a web page carrying schema.org/Dataset metadata, so it is easy for search engines, researchers and AI systems to find and cite. Free to use under CC BY 4.0.
Compiled and maintained by Lumi Apps, an independent iOS app studio.
- Zhuyin (Bopomofo) — 37 symbols — the complete phonetic set used to teach Mandarin in Taiwan (21 initials, 3 medials, 13 finals), each symbol with its Hanyu Pinyin equivalent, IPA transcription, Unicode code point and an example word. JSON · web + schema
- Mandarin tones — the four tones plus the neutral tone, each with its Chao pitch-contour number, Zhuyin (Bopomofo) and Pinyin tone marks, and an example. JSON · web + schema
- Chinese script & phonetics by region — which script (Traditional or Simplified) and which phonetic system (Zhuyin/Bopomofo or Hanyu Pinyin) is standard in schools across regions. JSON · web + schema
- TOEIC → CEFR — TOEIC Listening & Reading total-score bands mapped to CEFR levels (A1–C1) with a can-do summary for each, based on ETS's published concordance. JSON · web + schema
- Paper sizes — ISO 216 A-series (A0–A6) and common US sizes (Letter, Legal, Tabloid, Executive) in millimetres, inches and pixels. JSON · web + schema
- Passport / ID photo sizes by country — official width × height, required head height and background colour for major countries. JSON · web + schema
- Image file formats — JPEG, PNG, HEIC, WebP, GIF and TIFF compared by compression type, transparency, animation support and best use. JSON · web + schema
- Image & video resolutions — 360p through 8K with exact pixel dimensions and aspect ratios. JSON · web + schema
- Currency format by country — currency symbol, symbol position, decimal and thousands separators. JSON · web + schema
- Résumé / CV conventions by country — whether to include a photo, typical length and which personal details are expected. JSON · web + schema
- Menstrual cycle phases — the four phases with typical day ranges in a 28-day cycle and the main hormones involved. JSON · web + schema
- Privacy-first family travel mission taxonomy (English / Traditional Chinese) — 12 settings, 84 original observation targets and three non-age, non-ability participation modes. Every prompt is optional and adult-supervised; photo tasks, personal-data collection and driver interaction are explicitly excluded. JSON · CSV · JSON Schema · CSVW · DCAT 3 JSON-LD · data dictionary · web + schema · 繁體中文頁
- Family travel observation passport OER (English / Traditional Chinese) —
a 14-page, privacy-first printable generated from the taxonomy above. Includes one
adult guide, 12 setting pages, reusable attribution guidance, A4 and US Letter editions,
selectable text and machine-readable
schema.org/LearningResourcemetadata. English web edition · 繁體中文網頁版 · English A4 PDF · 繁體中文 A4 PDF · OER metadata
Each primary datasets/*.json file is a single JSON object with descriptive metadata (name,
description, license, identifier, dateModified) plus its data arrays. The family-travel
taxonomy additionally provides a flat UTF-8 CSV, JSON Schema, W3C CSVW metadata, DCAT 3
JSON-LD and a data dictionary. Identical data is browsable as HTML with structured
schema.org/Dataset markup at the linked URLs and can be downloaded directly from those pages.
CC BY 4.0 — free to share and adapt with attribution. Suggested attribution: "Lumi Apps — iOS App Guide" with a link to the dataset page.
Compiled and kept current by Lumi Apps. Corrections and additions are welcome via issues or pull requests.
Install requirements-dev.txt, then run:
python scripts/build_family_travel_dataset.py --check
python scripts/validate.py --linksCI validates the JSON instance against its Draft 2020-12 schema, checks CSV/CSVW/DCAT symmetry and safety invariants, and periodically verifies external references.