Dataset
OpenDeco synthetic pipeline fixture, not real data
This fixture holds five synthetic exposures written to exercise the OpenDeco path from dataset through adapter to prediction. Every value in it was generated. No exposure, subject, measurement, gas mix or outcome is derived from any real dive, study, publication, table or device.
CautionSynthetic fixture
NoteThis source records no medically verified outcome
Overview
Five exposures: two single air exposures at different ambient pressures, one nitrox exposure, and a repetitive pair linked by a series identifier where the second exposure opens with a surface interval and replays from the first exposure's final tissue state.
The bundle is frozen. Its digest is committed beside it and the test suite regenerates the fixture and compares the two, so a silent edit breaks the build.
- Record identifier
- synthetic_pipeline_fixture
- Version
- 1.0.0
- Revision kind
- Scientific version
- Acquisition state
- Quality gates passed
- Frozen at
- 2026-08-30
Source and citation
The dataset record carries no source location metadata, no study identifier, no source checksum and no citation, because no external source exists. Citing this fixture in scientific work would be citing a generator.
- Source owner
- OpenDeco
- Generator
- opendeco_adapters.synthetic.generator
- External source
- Does not exist for this sourceNo external source exists and none is implied.
- Citation
- Does not exist for this sourceA generated fixture is not a citable scientific source.
Population and exposures
Ambient pressure across the five exposures runs from 101,325 Pa at the surface to 461,325 Pa. In the derived display view of ADR-0007, using the fixture's own named conversion of 10,000 Pa per metre, that upper figure is 36 msw.
- Exposures
- 5
- Subjects
- Does not exist for this sourceGenerated exposures have no subject.
- Environment
- Open water, immersed
- Minimum ambient pressure
- 101,325Pa
- Maximum ambient pressure
- 461,325Pa
- Depth equivalent at maximum
- 36msw, derived
- Gas mixes
- 2, air and nitrox 32
Outcomes
Each exposure carries one boolean label recorded as an other physiological endpoint with observation class exposure only, because nothing was observed and the outcome vocabulary has no term that would honestly describe a generated value as an observation.
- Outcome records
- 5
- Outcome type
- Other physiological endpoint
- Endpoint name
- synthetic_fixture_label
- Value kind
- Boolean
- Adjudication method
- Automated rule
- Decompression sickness cases
- Does not exist for this sourceNo clinical outcome was assessed, so no case count exists.
Variables and units
All pressures are absolute pascals and all times are seconds, per ADR-0007. The depth equivalents are a display-only derivation computed through the named conversion fixed_10000_pa_per_metre, which is recorded on every exposure's pressure reference so that the conversion travels with the data.
| Field | Unit | Provenance |
|---|---|---|
| start_ambient_pressure_pa | Pa | Generated |
| end_ambient_pressure_pa | Pa | Generated |
| start_time_s | s | Generated |
| end_time_s | s | Generated |
| oxygen_fraction | fraction of 1 | Generated |
| nitrogen_fraction | fraction of 1 | Generated |
| helium_fraction | fraction of 1 | Generated |
| surface_ambient_pressure_pa | Pa | Standard atmosphere |
| depth_equivalent_msw_at_start | msw | Derived for display |
| depth_equivalent_msw_at_end | msw | Derived for display |
Missingness
Every required field is populated, because the generator writes them all. A real source produces gaps and this fixture cannot stand in for that behaviour.
- Fields missing
- 0 of 10
Access and licence
The fixture is released under CC0-1.0 and may be redistributed, modified and used commercially. Rights review is resolved as permitted. The licence covers a generated file and confers no permission over any real dataset.
- Data classification
- PUBLIC
- Access type
- Public
- Licence
- CC0-1.0
- Redistribution
- Allowed
- Citation required
- No
- Rights review
- Resolved, permitted
Model-development history
No model in the registry was developed, calibrated or tuned on this fixture. The leakage registry of spec 191 holds no relationship pointing at it.
Does not exist for this source
A generated fixture cannot be development evidence for a model, and no relationship record claims otherwise.
OpenDeco normalization
The generator writes canonical records directly, so no transformation from a source vocabulary was applied and no transformation log exists. The ingestion parser and the fifteen quality gates are exercised by the two source fixtures listed beside this record in the catalogue.
Quality flags
The ingestion gate suite of spec 113 runs over a parsed source. This bundle is generated straight into the canonical schema, so the suite does not apply to it and the record carries no quality gate result.
- Benchmark eligible
- No
- Reason
- Synthetic. It must never enter a scientific benchmark or a published release.
Content addressing
- Bundle digest, SHA-256
- 3bbfbcd71e60e4ee308d08ff3d8f5761eeca19bd94ebf7a3e3b3d3c89269ee10The canonical serialisation of the whole fixture bundle under ADR-0009.
Record source
- Repository path
- science/fixtures/synthetic/dataset.json
- Acquisition state
- Quality gates passed
- Classification
- PUBLIC
- Frozen
- Yes
- Benchmark eligible
- No
Elsewhere