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Glossary

Definitions of key terms and concepts used in VynFi documentation

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A

Anomaly Injection
The process of deliberately inserting realistic anomalies (e.g., duplicate invoices, round-number amounts, timing irregularities) into synthetic data to simulate real-world error patterns. VynFi supports 33 anomaly types across 5 categories.
API Key
Authentication credential for accessing the VynFi API. Keys use the format vf_live_ (production) or vf_test_ (sandbox) followed by 32 base62 characters.
Argon2
Password-hashing algorithm used by VynFi to securely store API key hashes. Selected for resistance to GPU-based attacks.

B

Benford’s Law
Statistical law predicting the frequency distribution of leading digits in naturally occurring datasets. VynFi achieves MAD (Mean Absolute Deviation) < 0.006 from Benford's distribution, indicating high statistical realism. See the methodology documentation for details.
Bus Factor
The minimum number of team members whose absence would jeopardize the project. VynFi’s operational model addresses this through comprehensive runbooks and infrastructure-as-code.

C

Copula
A statistical function that describes the dependence structure between random variables. VynFi uses 5 copula families (Gaussian, Clayton, Gumbel, Frank, Student-t) to model correlations between financial data fields. See the methodology documentation for details.
Credit
VynFi's billing unit. Credits are consumed when generating synthetic data, with rates varying by data type and complexity. See the credit system documentation for details.
Coherence Validator
One of 15 automated checks that ensure generated data maintains internal consistency (e.g., debits equal credits, dates are sequential, account balances reconcile).

D

DataSynth
The Rust engine that powers VynFi’s data generation. Purpose-built for high-throughput synthetic financial data, it generates 100K+ rows per second with domain-specific financial data models.
DPA (Data Processing Agreement)
A legally binding contract between a data controller and processor, required by GDPR Article 28. VynFi provides a standard DPA for enterprise customers. See the DPA page for the full agreement.

F

F1 Score
A measure of model accuracy combining precision and recall. VynFi synthetic data achieves F1 scores within ~3% of real-world data when used to train ML anomaly detection models.
Fingerprint
A statistical profile capturing the distributional characteristics of a real-world dataset. Fingerprints enable VynFi to generate synthetic data that matches specific organizational patterns without exposing actual data. See the methodology documentation for the fingerprint system details.

G

GDPR
General Data Protection Regulation. EU regulation governing the processing of personal data. VynFi is designed to be GDPR-compliant with data residency controls and DPA support.

H

HPA (Horizontal Pod Autoscaler)
Kubernetes feature that automatically scales the number of API pods based on CPU utilization or custom metrics. VynFi uses KEDA for enhanced autoscaling.

J

Journal Entry (JE)
A financial accounting record that debits one or more accounts and credits others. VynFi generates realistic journal entries with proper double-entry bookkeeping constraints.

K

KEDA (Kubernetes Event-Driven Autoscaling)
Autoscaler used by VynFi to scale generation workers based on Service Bus queue depth, enabling burst capacity for large generation jobs.

L

Line Item
An individual debit or credit within a journal entry. VynFi has analyzed 2.4 billion line items from 155 real-world datasets for calibration.

M

MAD (Mean Absolute Deviation)
Statistical measure of Benford’s Law conformance. Lower MAD indicates more realistic digit distributions. VynFi achieves MAD < 0.006.
MRR (Monthly Recurring Revenue)
The predictable monthly revenue from active subscriptions.

P

PITR (Point-in-Time Recovery)
Database restore capability allowing recovery to any second within the retention window. VynFi PostgreSQL backups support 35-day PITR with geo-redundancy.
Process Family
A category of financial processes (e.g., Order-to-Cash, Procure-to-Pay). VynFi models 11 process families covering the full accounting lifecycle.

R

RFC 7807
Standard format for HTTP API error responses ("Problem Details"). VynFi API errors follow this specification for consistent error handling. See the API reference for error response examples.

S

Sector Pack
A curated collection of fingerprints calibrated to a specific industry vertical. Available sectors include Retail, Manufacturing, Financial Services, Healthcare, Technology, Energy, and Real Estate.
SSE (Server-Sent Events)
HTTP-based protocol used by VynFi for real-time job progress streaming. Clients receive progress updates as the generation job executes.
Subledger
A detailed accounting record that feeds into the general ledger. VynFi generates 4 subledger types: Accounts Receivable, Accounts Payable, Fixed Assets, and Inventory.

T

Trial Balance
A financial report listing all account balances at a point in time. VynFi ensures generated trial balances maintain the fundamental accounting equation (Assets = Liabilities + Equity).

W

Webhook
An HTTP callback that VynFi sends when events occur (e.g., job.completed, job.failed). Configured via the dashboard or API. See the API reference for webhook configuration details.