NRGI mock data model

extractives_model.txt

commodity
    id
    label

concession_type
    id
    label

company
    id
    label
    jusrisdiction
    opencorporates_url
    website_url

company_hierarchy
    parent_id
    child_id
    percentage_ownership

source_document_company
    company_id
    source_document_id

source_document
    id
    url
    publisher_label
    publisher_url
    publication_date


concession
    id
    label
    country
    commodity_id
    concession_type_id
    source_document_id
    project_area


contract
    id
    country
    commodity_id
    source_document_id
    project_area

contract_company
    contract_id
    company_id
    ..? percentage

contract_concession
    contract_id
    concession_id

project
    id
    label

concession_project
    project_id
    concession_id


## Candidates

license, license_area
block
production_area
production_well