The Comparative Legislators Database (CLD) comes as a relational database. This means that all tables can be joined with the Core table via one of two keys - the Wikipedia page ID or the Wikidata ID. These keys uniquely identify individual politicians.
For each legislature, the CLD holds nine tables:
- Core (sociodemographic data)
- Political (political data)
- History (full revision records of individual Wikipedia biographies)
- Traffic (daily user traffic on individual Wikipedia biographies starting from July 2007)
- Social (social media handles and personal website URLs)
- Portraits (URLs to portraits)
- Offices (public offices)
- Professions (professions)
- IDs (identifiers linking politicians to other files, databases, or websites)
The figure below illustrates this structure and the CLD’s content.