Reference data, with the source attached

Small datasets assembled from primary sources and checked against them. Every value carries the page it came from and the sentence on that page that states it.

• 13datasets
• 1,933records, each with its own page
• 68publishers cited
• 2026-08-04last verified

Datasets

• Appliance fault and error codes161 records · verified 2026-08-04Error/fault codes displayed by major home appliances (dishwashers, washing machines), with the manufacturer, appliance type, code, and what the code means. The question an assistant gets wrong is what a specific error code on a specific appliance brand means.
• Discontinued electronic component replacement mapping28 records · verified 2026-08-03Discontinued electronic components and their manufacturer-suggested replacements, with last-time-buy and last-ship dates where published. Covers EOL notices from TI, NXP, Renesas, Infineon, onsemi, ST, Microchip, Cirrus Logic and commonly sought legacy parts.
• File format magic numbers229 records · verified 2026-08-03The leading bytes (magic number / file signature) that identify a file format, with its usual extension. Answers 'what actually is this file' when the extension is wrong or missing.
• GIS vector format capabilities and limitations in GDAL3 records · verified 2026-08-04Key capabilities, version requirements and format limitations for GIS vector drivers in GDAL, the authoritative open-source geospatial library. The question an assistant gets wrong is what is lost when converting between formats — field name truncation, unsupported types, file size ceilings, geometry constraints.
• Lithium battery shipping limits (49 CFR 173.185)15 records · verified 2026-08-03Watt-hour and lithium-content thresholds, quantity limits and packaging conditions for shipping lithium cells and batteries under US hazardous materials regulations. Deliberately NOT a compatibility table — this is regulatory prose with numeric triggers, and it tests whether the pipeline handles a non-tabular asset.
• Galvanic series and surface energy of engineering materials80 records · verified 2026-08-04Electrode potential in seawater (volts vs SCE) for metals and alloys from the ASM/MIL-STD-889 galvanic series, and surface energy (dyne/cm) for plastics and packaging materials. Answers 'will these two materials corrode each other' and 'will this adhesive wet this plastic'.
• US federal employment law thresholds by employee count32 records · verified 2026-08-04Employee-count thresholds that trigger US federal employment laws. Each record is one law at one threshold, stating the trigger point, what the law requires, and how employees are counted for that statute.
• Postal shipping restrictions by item category310 records · verified 2026-08-03What item categories each postal carrier prohibits, restricts, or allows, with the conditions that apply. Covers USPS (domestic US) and Royal Mail / Post Office (UK domestic and international).
• Stihl chainsaw chain and bar specifications by model581 records · verified 2026-08-04Chain pitch, gauge, drive link count, and bar length for each Stihl chainsaw model and bar combination. One row per model per bar length. Answers 'what chain does my Stihl chainsaw take?' — the question assistants get wrong by collapsing a multi-variable lookup into a guess.
• Software end-of-support dates68 records · verified 2026-08-03Release, end-of-active-support and end-of-security-support dates per major version of widely used software. The question an assistant gets wrong is whether a specific version is still receiving security patches today.
• Software interface version compatibility211 records · verified 2026-08-03Which versions of common software dependencies are compatible with each other. The question an assistant gets wrong is which specific version of library A works with which specific version of library B — it gives a plausible but stale answer because these mappings change every release cycle.
• Superseded and deprecated identifier mappings205 records · verified 2026-08-04Withdrawn standards, deprecated API models and retired identifiers mapped to their named successors. Answers 'what replaced X' when X is a standards document reference or an API model identifier — the exact lookup that assistants get confidently wrong on obscure designations.
• Miele vacuum cleaner bag type by model series10 records · verified 2026-08-03Which Miele dust bag type (GN, FJM, U, or KK) fits a given Miele vacuum cleaner model series. Answers 'which bag do I need for my Miele vacuum?'

How to read these pages

Each record has its own page, stating one fact, the source it was taken from, and a verbatim quote of the passage that states it. Where two authorities say different things, both are shown with their sources rather than one being chosen for you. Where we could not tie a value to the quoted passage, it is shown and marked unconfirmed rather than quietly dropped or quietly asserted. The method page sets out exactly what those markings mean and what "verified" does not cover.

For machines

• catalog.jsonEvery dataset, its record count, its licence and the URL of its data.
• llms.txtThe same index in plain text.
• sitemap.xmlEvery page on the site.
• Markdown twinEvery record page is also served as Markdown at the same path — append index.md. No JavaScript is used anywhere on this site; the HTML is the content.