Exact Record Link Candidates
Produce every admissible cross-table candidate using explicitly normalized Unicode-scalar Levenshtein distances and exact integer weighted costs. Includes all tied best candidates; never selects an identity, asserts duplicates or merges records.
data-assurance · Operation ID: records-link-candidates
Choose this operation when
- Return a complete bounded candidate queue with exact field-distance evidence
Outside this profile
- Identity resolution, true-duplicate assertions, automatic merging, confidence probabilities or semantic similarity
- Medical, employment, credit or other high-impact decisions about people
- Large-table nearest neighbors, top-k retrieval or transposition distance
- Network requests, file changes, external execution, publishing or deployment
Exact release references
Static JSON contract · Markdown reference · Fixed example response
Complete input schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"left": {
"maxItems": 16,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"values": {
"minItems": 1,
"maxItems": 3,
"type": "array",
"items": {
"type": "string",
"maxLength": 256
}
}
},
"required": [
"id",
"values"
],
"additionalProperties": false
}
},
"right": {
"maxItems": 16,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"values": {
"minItems": 1,
"maxItems": 3,
"type": "array",
"items": {
"type": "string",
"maxLength": 256
}
}
},
"required": [
"id",
"values"
],
"additionalProperties": false
}
},
"fields": {
"minItems": 1,
"maxItems": 3,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"weight": {
"type": "integer",
"minimum": 1,
"maximum": 100
},
"maxDistance": {
"type": "integer",
"minimum": 0,
"maximum": 128
},
"normalization": {
"type": "object",
"properties": {
"unicodeForm": {
"type": "string",
"enum": [
"none",
"NFC",
"NFKC"
]
},
"asciiCase": {
"type": "string",
"enum": [
"preserve",
"lower"
]
},
"asciiWhitespace": {
"type": "string",
"enum": [
"preserve",
"collapse-trim"
]
}
},
"required": [
"unicodeForm",
"asciiCase",
"asciiWhitespace"
],
"additionalProperties": false
}
},
"required": [
"id",
"weight",
"maxDistance",
"normalization"
],
"additionalProperties": false
}
},
"maxWeightedDistance": {
"type": "integer",
"minimum": 0,
"maximum": 38400
}
},
"required": [
"left",
"right",
"fields",
"maxWeightedDistance"
],
"additionalProperties": false
}
Complete output-envelope schema
{
"type": "object",
"required": [
"operation",
"version",
"result",
"provenance"
],
"properties": {
"operation": {
"const": "records-link-candidates",
"type": "string"
},
"version": {
"const": "0.29.0",
"type": "string"
},
"result": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"profile": {
"type": "string",
"const": "explicit-normalized-levenshtein-candidates-v1"
},
"fields": {
"minItems": 1,
"maxItems": 3,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"weight": {
"type": "integer",
"minimum": 1,
"maximum": 100
},
"maxDistance": {
"type": "integer",
"minimum": 0,
"maximum": 128
},
"normalization": {
"type": "object",
"properties": {
"unicodeForm": {
"type": "string",
"enum": [
"none",
"NFC",
"NFKC"
]
},
"asciiCase": {
"type": "string",
"enum": [
"preserve",
"lower"
]
},
"asciiWhitespace": {
"type": "string",
"enum": [
"preserve",
"collapse-trim"
]
}
},
"required": [
"unicodeForm",
"asciiCase",
"asciiWhitespace"
],
"additionalProperties": false
}
},
"required": [
"id",
"weight",
"maxDistance",
"normalization"
],
"additionalProperties": false
}
},
"maxWeightedDistance": {
"type": "integer",
"minimum": 0,
"maximum": 38400
},
"normalizedLeft": {
"maxItems": 16,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"values": {
"minItems": 1,
"maxItems": 3,
"type": "array",
"items": {
"type": "string",
"maxLength": 256
}
}
},
"required": [
"id",
"values"
],
"additionalProperties": false
}
},
"normalizedRight": {
"maxItems": 16,
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"values": {
"minItems": 1,
"maxItems": 3,
"type": "array",
"items": {
"type": "string",
"maxLength": 256
}
}
},
"required": [
"id",
"values"
],
"additionalProperties": false
}
},
"candidates": {
"maxItems": 256,
"type": "array",
"items": {
"type": "object",
"properties": {
"leftId": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"rightId": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"fieldDistances": {
"minItems": 1,
"maxItems": 3,
"type": "array",
"items": {
"type": "object",
"properties": {
"fieldId": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"distance": {
"type": "integer",
"minimum": 0,
"maximum": 128
},
"weightedDistance": {
"type": "integer",
"minimum": 0,
"maximum": 12800
}
},
"required": [
"fieldId",
"distance",
"weightedDistance"
],
"additionalProperties": false
}
},
"cost": {
"type": "string",
"pattern": "^(?:0|[1-9][0-9]*)$"
}
},
"required": [
"leftId",
"rightId",
"fieldDistances",
"cost"
],
"additionalProperties": false
}
},
"perLeft": {
"maxItems": 16,
"type": "array",
"items": {
"type": "object",
"properties": {
"leftId": {
"type": "string",
"minLength": 1,
"maxLength": 80
},
"candidateCount": {
"type": "integer",
"minimum": 0,
"maximum": 16
},
"minimumCost": {
"anyOf": [
{
"type": "string",
"pattern": "^(?:0|[1-9][0-9]*)$"
},
{
"type": "null"
}
]
},
"bestRightIds": {
"maxItems": 16,
"type": "array",
"items": {
"type": "string",
"minLength": 1,
"maxLength": 80
}
}
},
"required": [
"leftId",
"candidateCount",
"minimumCost",
"bestRightIds"
],
"additionalProperties": false
}
},
"noCandidateLeftIds": {
"maxItems": 16,
"type": "array",
"items": {
"type": "string",
"minLength": 1,
"maxLength": 80
}
},
"pairComparisonCount": {
"type": "integer",
"minimum": 0,
"maximum": 256
},
"fieldComparisonCount": {
"type": "integer",
"minimum": 0,
"maximum": 768
},
"dpCellCount": {
"type": "integer",
"minimum": 0,
"maximum": 262144
},
"candidateSetComplete": {
"type": "boolean",
"const": true
},
"identityResolved": {
"type": "boolean",
"const": false
},
"externalRequests": {
"type": "number",
"const": 0
}
},
"required": [
"profile",
"fields",
"maxWeightedDistance",
"normalizedLeft",
"normalizedRight",
"candidates",
"perLeft",
"noCandidateLeftIds",
"pairComparisonCount",
"fieldComparisonCount",
"dpCellCount",
"candidateSetComplete",
"identityResolved",
"externalRequests"
],
"additionalProperties": false
},
"provenance": {
"type": "object",
"required": [
"inputSha256",
"outputSha256",
"deterministic",
"externalRequests"
],
"properties": {
"inputSha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"outputSha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
},
"deterministic": {
"const": true
},
"externalRequests": {
"const": 0
}
}
}
},
"additionalProperties": false
}
Fixed example
One accepted fixed example, not a custom-input trial. No operation runs when this static page is requested.
Example input
{
"fields": [
{
"id": "label",
"weight": 2,
"maxDistance": 2,
"normalization": {
"unicodeForm": "NFC",
"asciiCase": "lower",
"asciiWhitespace": "collapse-trim"
}
},
{
"id": "family",
"weight": 1,
"maxDistance": 0,
"normalization": {
"unicodeForm": "NFC",
"asciiCase": "lower",
"asciiWhitespace": "collapse-trim"
}
}
],
"maxWeightedDistance": 4,
"left": [
{
"id": "L1",
"values": [
" Axle 12 ",
"CHASSIS"
]
},
{
"id": "L2",
"values": [
"pump",
"fluid"
]
}
],
"right": [
{
"id": "R1",
"values": [
"axle 12",
"chassis"
]
},
{
"id": "R2",
"values": [
"axel 12",
"chassis"
]
},
{
"id": "R3",
"values": [
"pump",
"fluid"
]
}
]
}
Example response
{
"operation": "records-link-candidates",
"version": "0.29.0",
"result": {
"profile": "explicit-normalized-levenshtein-candidates-v1",
"fields": [
{
"id": "label",
"weight": 2,
"maxDistance": 2,
"normalization": {
"unicodeForm": "NFC",
"asciiCase": "lower",
"asciiWhitespace": "collapse-trim"
}
},
{
"id": "family",
"weight": 1,
"maxDistance": 0,
"normalization": {
"unicodeForm": "NFC",
"asciiCase": "lower",
"asciiWhitespace": "collapse-trim"
}
}
],
"maxWeightedDistance": 4,
"normalizedLeft": [
{
"id": "L1",
"values": [
"axle 12",
"chassis"
]
},
{
"id": "L2",
"values": [
"pump",
"fluid"
]
}
],
"normalizedRight": [
{
"id": "R1",
"values": [
"axle 12",
"chassis"
]
},
{
"id": "R2",
"values": [
"axel 12",
"chassis"
]
},
{
"id": "R3",
"values": [
"pump",
"fluid"
]
}
],
"candidates": [
{
"leftId": "L1",
"rightId": "R1",
"fieldDistances": [
{
"fieldId": "label",
"distance": 0,
"weightedDistance": 0
},
{
"fieldId": "family",
"distance": 0,
"weightedDistance": 0
}
],
"cost": "0"
},
{
"leftId": "L1",
"rightId": "R2",
"fieldDistances": [
{
"fieldId": "label",
"distance": 2,
"weightedDistance": 4
},
{
"fieldId": "family",
"distance": 0,
"weightedDistance": 0
}
],
"cost": "4"
},
{
"leftId": "L2",
"rightId": "R3",
"fieldDistances": [
{
"fieldId": "label",
"distance": 0,
"weightedDistance": 0
},
{
"fieldId": "family",
"distance": 0,
"weightedDistance": 0
}
],
"cost": "0"
}
],
"perLeft": [
{
"leftId": "L1",
"candidateCount": 2,
"minimumCost": "0",
"bestRightIds": [
"R1"
]
},
{
"leftId": "L2",
"candidateCount": 1,
"minimumCost": "0",
"bestRightIds": [
"R3"
]
}
],
"noCandidateLeftIds": [],
"pairComparisonCount": 6,
"fieldComparisonCount": 12,
"dpCellCount": 581,
"candidateSetComplete": true,
"identityResolved": false,
"externalRequests": 0
},
"provenance": {
"inputSha256": "588279a822903512cb726f70c274fe5639f800e1c38cb18a1f1212977f108aa1",
"outputSha256": "066667d2abaa77c4727ecf26453c0db3274d95e1008d452b7555be3af7f429eb",
"deterministic": true,
"externalRequests": 0
}
}
Bounds and precision
JavaScript IEEE-754 numbers; use strings for large integer IDs/exact decimals where the schema accepts strings. No lossless numeric parsing.
{
"global": {
"requestBytes": 131072,
"responseBytes": 524288,
"jsonDepth": 32,
"jsonNodes": 20000,
"requestsPerMinute": 60,
"paidAttemptsPerMinute": 20,
"idempotencyHours": 24
},
"operation": {
"inputBytes": 100000,
"outputBytes": 300000,
"jsonNodes": 12000,
"depth": 20,
"dpCells": 262144,
"rowsPerSide": 16,
"fields": 3,
"valueScalars": 128,
"idCodeUnits": 80,
"weight": 100,
"maxWeightedDistance": 38400,
"candidates": 256,
"comparisonUnit": "unicode-scalars",
"normalizationOrder": "unicodeForm,asciiCase,asciiWhitespace",
"candidateSet": "complete-for-declared-rules"
}
}
Complete schemas, descriptions and cross-field validation may impose additional limits.
Proposed price and protocol definitions
{
"unit": "one successful operation call",
"proposedNominalUsd": "0.006",
"sixDecimalTokenBaseUnits": "6000",
"subscription": false,
"includesPayerWalletOrNetworkFees": false,
"liveQuoteVerified": false,
"condition": "Actual SDK challenge is authoritative only within the caller's explicit authorization; configured six-decimal token peg is an operator assertion, not a conversion guarantee."
}
Protocol definitions: x402, mpp. MPP uses Tempo charge. Paid MCP execution is unsupported. All runtime readiness is not evaluated in this build.
API path templates, not endpoints on this documentation host
{
"x402": "/v1/x402/records-link-candidates",
"mpp": "/v1/mpp/records-link-candidates"
}
Required headers
{
"Content-Type": "application/json",
"Idempotency-Key": "random 16–128 character operation identifier"
}
Actual SDK challenge amount, asset, network, recipient and wallet costs must pass independent authorization. Preserve identical key, body, protocol and credential on retries; on PAYMENT_UNCERTAIN stop and reconcile.
Execution profile and provider conditions
{
"deterministic": true,
"externalRequests": 0,
"maxExternalRequests": 0,
"resultSnapshotPersisted": false,
"fixedExampleIsIllustrativeSnapshot": false,
"requiresPayment": true,
"supportsMcpExecution": false
}
Deterministic supplied-input operation with no external requests or stored request/result bodies. Payment infrastructure retains payment metadata and hashes.
Failure handling
- HTTP 400: Malformed JSON, missing/invalid idempotency key, or payment identifier mismatch Correct the request before payment
- HTTP 402: Payment challenge or rejected payment Use official protocol SDK; inspect payment outcome before another payment
- HTTP 409: Idempotency conflict, duplicate proof, or PAYMENT_UNCERTAIN Keep original key, body, and proof; reconcile uncertainty with operator; never blindly repay
- HTTP 413: Input or generated output too large Reduce input; no payment attempted for validation failure
- HTTP 415: Unsupported media type or compression Send uncompressed application/json
- HTTP 422: Schema or service-specific semantic validation failure Correct input using returned error code; no payment attempted
- HTTP 429: Request/payment-attempt rate exceeded Wait for rate limit window; preserve existing payment identity
- HTTP 503: Payment configuration/provider/state unavailable, or live DNS preparation failed before settlement Check readiness; DNS preparation failures may retry the identical key/body/credential only; uncertainty requires reconciliation
Declared requirements
Before any paid call, refresh the live operation contract and POST the complete bounded budgeted plan to the separate API's /preflight. Unknown requirements block selection; compatible preflight is not permission to spend.