Glossary Updates12 new terms added to the glossaries · October 2, 2026, 22:44 CEST
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Glossary · System coordination, integration and orchestration

Schema mapping

Also known as: Data mapping

German: Schemaabbildung

In data integration, schema mapping is the specification of how the elements of one data schema correspond to the elements of another, including transformations of names, structures, data types and units, so that data can be exchanged or merged between systems.

  • System integration

In one sentence

Schema mapping specifies how elements of one data schema correspond to another, including conversions of names, types and units.

Example

A mapping translates the ERP field MATNR to the MES attribute materialId and converts the target weight from kilograms to grams for the filling machine.

How it applies

  • Engineering: A mapping covers structure (which field goes where), semantics (does "status" mean the same thing on both sides?) and values (units, code lists, time zones). Semantic mismatches are the hardest to spot.
  • Maintenance: Mappings break when either schema changes. Version them together with the schemas and include them in Schema governance.
  • Verification: Test mappings with real data, edge cases and missing values; silent truncation or unit errors can go unnoticed for a long time.
  • Documentation: Keep mappings in a readable, reviewable form (mapping tables, not only code). In technical documentation, schema mappings connect content metadata models, for example a company's product taxonomy to iiRDS metadata.

Schema mapping vs. protocol conversion

Protocol conversion changes the transport of data between communication protocols. Schema mapping changes the structure and meaning of data between models. Integration projects usually need both, and mixing them in one undocumented step makes errors hard to trace.

By knowledge.aitechdoc.world · Published September 26, 2026 · Last reviewed

Source: AI TechDoc Knowledge editorial definition, based on data integration practice

Definitions follow the cited standards and specifications. Where a source is a copyrighted publication, such as an ISO, IEC or EN standard, the definition is a close paraphrase, not a verbatim quotation, so as not to infringe copyright. We recommend reading the original publication. The sections “How it applies” are editorial commentary by AI TechDoc Knowledge and are not part of any standard.

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