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Data

Data cleansing

Wide-scale data-quality uplift in mission-critical registries.

From data exchange layers and registry modernisation to data cleansing and unique identifiers, transforming fragmented records into the reliable data foundation that e-services, policymaking and AI depend on.

Our methodology combines source-level analysis, schema normalisation, record linkage, duplicate resolution, attribute- and identifier-based conformity checks, and both automated and manual verification.

We have successfully improved tens of millions of records in various registries, including in environments where shared identifiers either do not exist or are of poor quality. The result is clean, consistent, machine-readable data that enables registries to interoperate, services to function correctly, and organisations to make more accurate and informed decisions.

Source Analysis & Data Profiling
01

Source Analysis & Data Profiling

We begin with systematic source-level analysis to understand the structure, content, and failure modes of the data. This includes profiling schemas, value distributions, null patterns, inconsistencies, and systemic errors. The outcome is a factual baseline that defines what can be fixed, how, and with what level of confidence.

Schema Normalisation & Structural Harmonisation
02

Schema Normalisation & Structural Harmonisation

We normalise and align data structures to create a consistent, machine-readable foundation. This includes resolving schema drift, harmonising field definitions, standardising formats, and aligning data types across sources. Where necessary, we redesign logical models to support interoperability without forcing unrealistic upstream changes.

Record Linkage, Matching & Duplicate Resolution
03

Record Linkage, Matching & Duplicate Resolution

We apply deterministic and probabilistic matching techniques to identify related records across datasets — even in environments without reliable shared identifiers. This includes attribute-based matching, contextual correlation, and rule-based resolution strategies. Duplicates are resolved in a controlled and auditable manner, preserving traceability and decision logic.

Attribute Validation & Identifier Conformity Checks
04

Attribute Validation & Identifier Conformity Checks

We perform deep validation of attributes and identifiers against defined rules, reference datasets, and external constraints. This includes format checks, logical consistency validation, checksum and range controls, and cross-field dependency checks. Where identifiers are missing or unreliable, we support the creation or reconstruction of stable internal keys.

Verification, Remediation & Controlled Data Correction
05

Verification, Remediation & Controlled Data Correction

We combine automated correction with targeted manual verification where risk or ambiguity requires human judgement. Corrections are applied using controlled workflows that preserve evidence, rollback capability, and auditability. The result is measurably improved data quality without introducing uncontrolled or opaque changes.

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Data governance

Policies, processes and platforms for trustworthy data use.