Reference
Migration Glossary
Plain definitions for the terms we use across this site. Written to be quotable and precise.
- Proven-Parity Migration™
- A migration methodology in which the converted application's behavior is demonstrated to match the original — by replaying the customer's own tests against both systems and scoring every response field MATCH or MISMATCH — rather than assumed correct.
- Functional-equivalence validation
- The practice of confirming that a migrated application produces the same outputs as the original for the same inputs, verified field-by-field against real responses, not mocks or scaffolding.
- Zero-egress migration
- A migration performed entirely inside the customer's own environment, where source code, generated artifacts, and data never leave that environment and no third-party cloud, LLM, or sub-processor is involved.
- DataWeave translation
- The automated conversion of MuleSoft's DataWeave transformation scripts into a runnable, editable equivalent that preserves the original transformation logic. In API Modernizer today, DataWeave is translated to the Transmute DSL and executed by the embedded Transmute engine; direct DataWeave-to-Java translation is on the roadmap.