Managing semantic mappings for semantic lineage and definition - 7.1

Talend Data Catalog Manager User Guide

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A semantic mapping is a relationship between two contents in the repository. It consists of one or more mapping elements, which are relationships defined between a destination element and one or more source elements.

In general, a semantic mapping describes how elements in a source model (more conceptual) define elements in a destination model (closer to an implementation or representation). Elements in the destination model are representations or implementations of the associated element in the source model.

There are three use cases for construction a semantic mapping:
  • Data standardization and compliance: such as linking an external standard data model to a physical data store and an enterprise data model.
  • Multi-level modeling of semantic relationships from conceptual to logical, and to physical data model: such as from a UML object model to IDEF1X data model.
  • Business glossary term classification: such as linking manually terms from a business glossary to technical columns from another model.

You can use the model mapper to define either semantic (meaning) or data flow relationships among models in Talend Data Catalog. It consists of the Mapping Editor and Mapping Reporter.