What is Talend Data Mapper? - 7.3

Talend Data Mapper User Guide

Version
7.3
Language
English
Product
Talend Big Data Platform
Talend Data Fabric
Talend Data Management Platform
Talend Data Services Platform
Talend MDM Platform
Talend Real-Time Big Data Platform
Module
Talend Studio
Content
Design and Development > Designing Jobs
Last publication date
2023-01-05

Talend Data Mapper allows you to map complex data records and documents and execute transformations.

In the Mapping perspective of Talend Studio, you can create a map and configure it by simply dragging and dropping the data from an input structure to an output structure. For more complex mappings, you can create expressions, based on a set of functions, to define the value of an element.

Core concepts

  • A structure defines the semantics of the data. It contains a root and a hierarchy of elements. For more information, see Working with structures.
  • A representation contains the information needed to produce a structure for a specific document format. The default representation is XML. For more information, see Representations properties.
  • An element is a portion of a structure, an XML element or a database column, for example.
  • A map is a transformation between an input and an output structure. For more information, see Working with maps.
  • A function is a unit of code that accepts a fixed or variable number of arguments and returns a single value. Functions are used to create expressions. For more information, see the Talend Data Mapper Functions Reference Guide.
  • An expression refers to the use of one or several functions to define the value of an element. For more information, see Working with expressions.
  • A loop is an expression that defines how to handle an element that can occur several times in the same object. For more information, see Loop expressions.