Methodology

Every value in Groundswell carries its basis. This page says how each kind of value is made and the rules every value follows.

The four kinds of value

Published

Loaded from the publisher exactly as published: a tender notice, a contract disclosure, a capital program.

Quoted

Read from a source document by machine and verified word for word against the text. Dates, money, emails, phone numbers and ABNs are parsed from the quote by code, never taken from a model.

Derived

Worked out by code from published text: disciplines named in a scope, a council buyer’s area, a buyer’s route to market counted from its awards.

Inferred

Read from the record or from verified sources by an agent. Its confidence is shown with its source.

Rules that hold for every value

• A value never appears without its basis and, where one exists, the quote it rests on.
• When sources disagree, both are shown with their dates. Nothing is silently picked.
• A fact past its freshness date is marked and rechecked.
• Contacts: only people named in public records in an official role; anyone can ask to be removed.