Collection Medium
https://publicschema.org/vocab/collection-medium
The physical or digital medium through which a consent indication was communicated and recorded. Orthogonal to consent-expression (which captures how the agreement was indicated) and to personal_data_categories (which describes what data is being processed). A biometric opt-in can be captured on an electronic medium; a signed opt-in can be captured on paper; the two axes do not collapse.
Values
| Code | Label | Standard code | Definition |
|---|---|---|---|
paper | Paper | Consent was indicated on a physical paper form, such as a printed notice with a signature field, a thumbprint box, or an X-mark field. Evidence is typically a scanned document or photograph referenced via evidence_ref. Common in community intake sessions and any context without reliable digital infrastructure. | |
electronic | Electronic | Consent was indicated through a digital interface, such as a web form, a tablet application, a mobile application, or an SMS/USSD interaction. The digital system creates the record directly. Includes both fully digital workflows and paper-to-digital workflows where a field worker enters data immediately on a device. | |
verbal | Verbal | Consent was communicated orally by the data subject without a written or biometric record being created at that moment. Verbal consent requires witnesses (populate witnessed_by) for audit purposes. The program's standard operating procedures should specify who may act as a witness and how the verbal consent is subsequently documented. Common when data subjects are illiterate or when community norms make written forms inappropriate. | |
mixed | Mixed | Consent was collected using a combination of media, for example a verbal explanation with a paper signature, or a paper form later digitised and supplemented with an electronic acknowledgement. Use this value when a single medium code would not accurately describe the intake process. Document the combination in evidence_ref or in a linked intake note. |
Other references
- ISO/IEC TS 27560:2023 - Privacy technologies: Consent record information structure structural pattern ISO/IEC TS 27560 Section 6.3 identifies collection medium as a required field for paper-first workflows. This vocabulary aligns with its four-value enumeration.