# Data dictionary

All counts refer to the page-type database snapshot of September 2026 (40,786,727 domains; 16,448,576 with at least one verified page type).

## page-type-prevalence.csv
- `page_type`: one of contact, about, legal, product, blog, login, help_center, pricing, events, careers, case_studies, leadership, sitemap, partners, press, documentation, security, status, community, integrations.
- `domains`: domains with at least one verified URL of this type.
- `share_of_domains_with_page_types`: `domains` / 16,448,576.
- `share_of_all_domains`: `domains` / 40,786,727.

## page-types-per-domain.csv
- `page_types_per_domain`: number of distinct page types found on a domain (0 = none found).
- `domains`, `share_of_all_domains`.

## languages.csv
- `language_code`: ISO 639-1 code of the site's detected main language; `language`: English name.
- `domains`, `share_of_all_domains`.

## language-page-types.csv
- `language_code`, `page_type`, `domains`.
- `share_of_language_domains`: `domains` / all domains of that language (including domains without page types).

## page-type-cooccurrence.csv
- `page_type_a`, `page_type_b`: an unordered pair of page types.
- `domains_with_both`: domains with verified URLs of both types; `share_of_domains_with_page_types`: / 16,448,576.

## host-list-categories.csv
- `host_category`: category of the separate host list (hosts that are denied or flagged regardless of page type).
- `default_action`: `deny` or `flag`. `hosts`: number of hosts in the category.