Co-signature / Co-authorship Network
cosignaturesv1.0Published: 2026-06-27Current versionCounts how often two MEPs appear as authors on the same parliamentary document or question.
edge_count(A,B) = count(distinct documents where A and B both have participation role AUTHOR)Included in the calculation
Official EP plenary documents and parliamentary questions with structured person participation data. Only participants mapped to known MEP IDs are counted. Pair counts are grouped by parliamentary term and document type.
Excluded from the calculation
Roll-call voting similarity, absences, non-author participation roles, unmapped persons, and documents where the upstream source does not expose structured authors. Amendments should be enabled only after validating author extraction quality for the specific source.
Limitations
This metric is shared authorship/co-signature evidence. Unless the source identifies a primary author or signature order, it should not be interpreted as “MEP B signed MEP A’s initiative”. Current v1 group/country breakdowns use current MEP affiliations, not historical affiliation on the document date.
Implementation: open source under MIT. The calculation logic lives in the project repository under pipelines/.