Data Transformation Mapping – Can it be Automated?
Please note: This post originally appeared on Extol.com (EXTOL has been acquired by Cleo).
In our previous post on this subject, we wrote about the neglected problem of data transformation mapping productivity, and its impact on integration project costs, particularly for B2B integration in companies with many customer relationships (and therefore many documents pairs to map).
Although attempts have been made to automate aspects of mapping, it remains largely a manual activity. Gartner and other industry analysts have published research on automated mapping methods, particularly Dictionary-based mapping, but real-world implementations haven’t put a serious dent in the mapping productivity problem. Why is that?
Mapping is a large and complex problem space. It accounts for the single largest part of integration time and effort, encompassing data validation, translation, value derivation, enrichment, aggregation, and routing. Defining these outcomes involves two kinds of specification, not one: source-target matching and transformation. Most attempts to automate mapping have focused intensively on the first part (matching), but very little on the second (data transformations). But the biggest obstacle to mapping automation is that specifying the right mapping action may require an understanding of business and data contexts and requirements. And that requires human decision-making.
So to the degree that mapping automation is possible, it must occur in the context of a broader, human-guided mapping process. Simply defining a source-target dictionary and “lighting the fuse” won’t produce a map that can be used in a production environment.
Integrating automated mapping methods with the human-guided mapping process imposes critical implementation requirements for integration technology providers, including:
- Unobtrusive integration of automation methods and human mapping decisions in the UI
- Support for both source-target matching and data transformation aspects of mapping
- Automation that works with both familiar and unfamiliar document types and combinations
- Results that can be verified quickly and easily by humans
- Configurability to suit different circumstances and preferences
- Ability to “learn” from and adapt past decisions to future mapping situations
Each of these requirements could be subjects for their own blog posts. The bottom line, however, is that past attempts to automate mapping have ignored or fallen short in all of these areas.
Automating data transformation mapping isn’t easy, but it is possible.