website-technologies / DATA_DICTIONARY.md
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Data dictionary: pracadata/website-technologies

Four configs, all Parquet (zstd). Every row has source, the attribution to the HTTP Archive. Dates are the first day of the crawl month (2026-10-01 is the October 2026 crawl).

Shared definitions

  • origin: the crawled root page as the HTTP Archive records it, with scheme and trailing slash (https://www.example.com/). example.com and www.example.com are different origins.
  • reg_domain: registrable domain of the origin (public suffix list), for example example.co.uk. Empty for IP addresses and hosts without a public suffix.
  • rank_bucket: Chrome UX Report popularity bucket of the origin: 1000, 5000, 10000, 50000, 100000, 500000, 1000000, 5000000, 10000000, 50000000. When desktop and mobile disagree, the smaller (more popular) one is used.
  • technology / categories: name and categories as detected by the HTTP Archive's fork of Wappalyzer. A technology can have several categories (a sorted list).
  • versions: sorted list of versions the page exposes (empty when none). Only values that look like a version are kept. Best effort.
  • detected_desktop / detected_mobile: whether the technology was detected by the desktop and/or the mobile crawl. At least one is true.
  • source: Derived from the HTTP Archive (<Month Year> crawl).

tech_by_domain (top 10,000 origins, latest crawl only)

One row per origin × technology.

Column Type Meaning
crawl_date date Crawl month (first day)
origin string See above
host string Host of the origin
reg_domain string See above
rank_bucket int See above (here always 1000, 5000 or 10000)
technology string Detected technology
categories list of string Its categories
versions list of string Detected versions
version_major int Leading integer of the first version, or null
detected_desktop bool Detected by the desktop crawl
detected_mobile bool Detected by the mobile crawl
source string Attribution

tech_changes_monthly (top 10,000 origins, latest pair of months, both_clients only)

One row per origin × technology × change between two consecutive crawls. Only origins present in both crawls, so a technology cannot be "removed" by an origin that left the crawl.

Column Type Meaning
month_from, month_to date The two crawls compared
origin, reg_domain, rank_bucket As above (rank of month_to)
technology string Technology that changed
change_type string added, removed (not detected in month_to; this is not proof of removal) or version_changed
old_versions, new_versions list of string Versions before and after
confidence string In this dataset always both_clients: the origin is in both the desktop and the mobile crawl in both months and both clients agree on the change. The Apify Actor also serves single_client changes, which reverse much more often
source string Attribution

tech_adoption_monthly (complete)

One row per crawl × technology × category × cumulative rank bucket.

Column Type Meaning
crawl_date date Crawl month
technology, category string A technology appears once per category: filter before summing
rank_bucket int Cumulative: 10000 counts the origins of the 1k, 5k and 10k buckets
origins bigint Origins in the bucket where the technology was detected
origins_in_bucket bigint Origins in the crawl within the bucket (including those with no detection)
share_of_origins double origins / origins_in_bucket
source string Attribution

technology_catalog (complete)

Column Type Meaning
technology string Name
categories list of string Categories
first_crawl_seen, last_crawl_seen date First and last crawl in this build with the technology
origins_last_crawl bigint Origins with the technology in the latest crawl
source string Attribution

The catalog has names, categories and counts only. Nothing is copied from the Wappalyzer repository (no detection rules, no icons, no descriptions).