Demiton
Demiton
Open source

The Demiton Classifier.

A procurement classification framework for Australian government contract disclosure data. Pure Python, zero runtime dependencies, rule-based outputs. Apache 2.0.

Quickstart

pip install demiton-classifier
from demiton_classifier import Contract, classify

contract = Contract(
    value_aud=1_588_168.0,
    title="Strategic Rail Advisory Services",
    supplier_name="Lunarr Advisory Pty Ltd",
    supplier_postcode="3206",
    procurement_method="Limited",
    number_of_offers_sought=1,
    has_variation=True,
)

result = classify(contract)
print(result.value_tier.value)             # "1m_to_10m"
print(result.supplier_locality.value)      # "interstate_au"
print(result.procurement_competition.value) # "limited_sole_source"
View on GitHubRead the methodology
Classification dimensions

Eight rule-based dimensions per contract.

Value tier

Bands by contract value: under $50k, $50k–$1M, $1M–$10M, $10M–$100M, over $100M.

Supplier locality

Metro, regional, interstate, international — derived from supplier postcode and address.

Procurement competition

Limited / sole-source vs panel vs open tender — derived from procurement method and offers sought.

Variation intensity

Whether contracts have variations and at what scale relative to baseline.

Engagement category

Construction, professional services, ICT, goods, advisory — derived from contract title and description.

Repeat-supplier flag

Whether the supplier appears multiple times for the same delivery authority.

Panel-vs-direct

Whether the contract is panel-arrangement or direct award.

Confidentiality flag

Whether commercial-in-confidence redactions apply.

Scope

In the package

  • • Eight classification dimensions
  • • Queensland disclosure-register schema parser
  • • Locality logic (state / postcode → metro / regional / interstate / international)
  • • Procurement-method analyzers
  • • Pure Python, no runtime dependencies
  • • Rule-based — same input always produces same output
  • • Apache 2.0 license

Not in the package

  • • ABR ownership-chain resolution
  • • Supply Nation Indigenous-certification verification
  • • AusTender / CKAN / BOM data ingestion
  • • Project-level financial composition
  • • Hosted API (available on Demiton Free / Insights / Connected)

Those capabilities are platform-side. The classifier package is the open core — fork it, run it offline, contribute back.

Contribute

Issues, pull requests, and methodology proposals are all welcome on GitHub. The framework's value compounds with the breadth of input.

github.com/demitonapp/classifier

Cite

For academic, policy, and journalistic citation:

Demiton (2026). The Demiton Classifier:
A procurement classification framework
for Australian government contract
disclosure data. https://demiton.io/methodology