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Urd Atlas methodology

Field Dictionary

This page defines the public meaning of the main published fields and the interpretation warnings that matter most for technical users.
OverviewReferenceFieldsVerificationFreshnessBoundariesChangelogIntegrityAI controls

How to use this page

Use this page when you already know the field name and need the public meaning, unit semantics, verification class, and interpretation boundaries. For deeper system-level logic, use the Public Methodology Reference page.

Long field paths are shown in wrapping code blocks and cards rather than compact tables, so the page remains readable on laptop and mobile widths.

Key Gold fields

tx_count_daily

Confirmed daily transaction count.

Direct daily chain activity count.
median_tx_fee_native

Typical same-day transaction fee in native denomination.

Published as a median, not an arithmetic average.
median_tx_value_native

Typical same-day transaction value in native denomination.

Optional for some chain profiles in Confidence v2; visible when available, but not always a confidence penalty when absent.
avg_block_time_sec

Typical daily inter-block interval behaviour.

Interpret as a robust typical block interval field, not as a strict arithmetic mean claim.

Key Meta fields

confidence.confidence_score

Top-line confidence of the published analytical state.

Confidence v2 uses sqrt(data_quality_score × label_confidence_score). The gate threshold remains 0.40.
confidence.methodology_version

Specific confidence methodology used for the row.

Current value is confidence_v2_profile_evidence for Confidence v2 rows.
confidence.data_quality_score

Profile-aware data completeness and freshness score.

Measures whether the chain-specific evidence surface is complete, fresh, dense, and historically deep enough. Structurally non-applicable fields are excluded from the denominator.
confidence.label_confidence_score

Label-specific evidence clarity score.

Measures whether the evidence supports the specific published label. HEATING, CONGESTED, CHEAP, and STABLE are evaluated against different evidence patterns.
confidence.candidate_label

The label supported by the evidence before the confidence gate is applied.

Used for auditability when the normal label is withheld as UNKNOWN/DEGRADED or when users need to inspect thin-margin classifications.
confidence.components.data_quality.required_metrics

Chain-specific metric list used for data-quality coverage.

These are the fields that count toward data-quality coverage for the chain profile. The list can differ across BTC, ETH L1, and L2 profiles.
confidence.components.data_quality.structurally_not_applicable

Fields that do not belong in the chain-specific confidence denominator.

Example: EVM-only execution fields are not data-quality penalties for Bitcoin. They are excluded because the product methodology does not treat them as expected BTC evidence.
confidence.components.data_quality.optional_not_penalized

Visible fields that are not treated as required confidence inputs for the current chain profile.

These fields may still be published or useful, but absence does not automatically reduce data quality under Confidence v2.
confidence.components.label_confidence.uses_score_raw

Whether label confidence was evaluated from raw scorecard evidence.

Current Confidence v2 rows use raw scorecard/regime evidence, not confidence-degraded display scores.
confidence.components.label_confidence.used

Component values used inside the label-specific confidence calculation.

The names vary by label family. STABLE emphasizes neutrality and lack of strong drivers; HEATING emphasizes demand/trend evidence; CONGESTED and CHEAP emphasize their relevant friction/capacity evidence.
status.one_liner

Readable public explanation of the current status.

Now distinguishes adjacent scorecard pressure from actual regime-threshold crossings. A STABLE label can include elevated scorecard pressure if the regime-axis threshold was not crossed.
status.explanation_support.status_note

Machine-readable copy source for nuanced status explanation.

Used when status needs to explain why a scorecard axis looks elevated or low while the regime label remains STABLE.
regime.label

Published descriptive state.

May change day to day when threshold conditions change. Rows below the confidence gate can be withheld as UNKNOWN/DEGRADED.
regime.determinism_hash

Canonical public integrity anchor for named regime rows.

Used for public row traceability when a non-gated label is published.

Key Briefs fields

schema

Brief artifact schema identifier.

Used to distinguish chain 7-day briefs, cross-chain briefs, site briefs, and manifest files.
brief_status

Publication state for a Briefs JSON artifact.

A published brief is generated from already published regime evidence.
window.updated_through

Latest date covered by the brief window.

Use this to understand freshness before comparing chains with different publication lag.
regime_path.dominant_label

Most common regime label inside the brief window.

This is descriptive window context, not a trading signal or forecast.
movement.type

Readable movement classification for the latest window.

Summarizes whether the latest regime path is stable, shifting, degraded, or low confidence.

Field note: Confidence v2

Composite confidence

confidence.confidence_score is not a standalone judgement. It is the geometric mean of data quality and label confidence.

sqrt(data_quality_score × label_confidence_score)

A row can therefore have perfect data quality and still have moderate confidence if the label evidence is thin, adjacent, or mixed.

Profile-aware data quality

confidence.components.data_quality.required_metrics lists the metrics that actually count toward coverage for this chain profile.

structurally_not_applicable fields are excluded from the denominator. optional_not_penalized fields remain visible but do not reduce confidence when absent.

Important interpretation warning

A higher data_quality_score after Confidence v2 does not mean the model became more optimistic. It means the data-quality denominator now matches the evidence surface that is actually meaningful for that chain.

Field note: status explanations

status.one_liner is the public readable explanation of the current state. For borderline stable rows it can now explicitly state that the scorecard shows adjacent pressure while the regime-axis evidence did not cross the threshold forHEATING, CHEAP, or CONGESTED.

Why this matters

The scorecard is a continuous descriptive surface. The regime label is a categorical thresholded state. They should be read together, but they are not identical. The status text is allowed to explain that distinction.

Field note: scorecard dimensions

scorecard.dimensions.<axis>.score is the published confidence-degraded display score for an axis.

scorecard.dimensions.<axis>.scoreClass A

Published confidence-degraded display score for an axis.

Recomputable from the published inputs score_raw and effective_confidence using the display-score formula below.
scorecard.dimensions.<axis>.score_rawClass C

Raw score before confidence degradation.

Used by Confidence v2 as part of label confidence. The historical normalization and calibration are publicly described in family terms, but not fully disclosed at implementation detail.
50 + (raw - 50) × effective_confidence

Interpretation boundary

Customers can fully verify the published display score from published row inputs. That does not mean the entire raw-score construction is fully reconstructable from public documentation alone.

Field note: regime drivers z robust

Driver z-score

regime.drivers[].z_robust is the driver-layer z-score published for a regime driver row. It is computed from 180-day raw daily values, not from the 7-day smoothed scorecard series.

Important comparison warning

Do not expect regime.drivers[].z_robust to numerically match a scorecard dimension score or the internal z-family behind that score. The driver z-score and the scorecard normalization use different input series, different windows, and different purposes.

Field note: fee burden proxy

Current value

scorecard.dimensions.friction.components.fee_burden_proxy.current is not a native fee amount. It is the current value of an internal friction proxy.

median_tx_fee_native / median_tx_value_native

Its unit is a dimensionless ratio, not a native-denominated fee. It measures fee burden relative to transaction value, not fee size in isolation.

Why this matters

A friction score can be elevated even when absolute fees are not unusually high in native terms, because the friction component is based on fee burden relative to transferred value. Customers should read this field as a burden proxy rather than as a direct fee amount.

Field note: Bitcoin blocktime instability

BTC capacity component

For BTC capacity interpretation, the capacity axis does not score raw block time directionally and does not combine with gas utilization. For BTC, blocktime_instability is the only capacity component.

|block_time - median30(block_time)| / median30(block_time)

The field is then smoothed before scoring.

Directional consequence

This means the BTC capacity score is not a direct measure of slow blocks only. It is a measure of unusual block-time behaviour around the recent norm in either direction. Customers should read BTC capacity as a stress-or-instability proxy, not as a directional slow-block indicator.

Field note: regime label stability

regime.label is a daily descriptive state, not a built-in multi-day stable segmentation layer.

Downstream use warning

Labels can change day to day in response to threshold crossings. This matters most for CONGESTED and CHEAP, which do not have a separate universal multi-day confirmation window. HEATING depends in part on a trend condition and therefore has a different stability profile. Customers who need multi-day regime stability should apply their own minimum-duration or smoothing rule.