1. Identify the source and target data sources: Identify the source and target data sources that you want to map. This could be different databases, applications, or files that contain data that needs to be mapped.
2. Analyze the data: Analyze the data in both the source and target data sources. This will help you understand the structure, format, and content of the data, as well as any differences or similarities between the data.
3. Identify the mapping rules: Identify the rules that will be used to map the data elements from the source to the target data source. These mapping rules will vary depending on the specific data being mapped, and may involve mapping data elements based on their content, format, or other criteria.
4. Create a data mapping template: Create a data mapping template that includes all of the data elements that will be mapped. The template should include the source data elements, the target data elements, and any mapping rules or criteria that will be used to map the data.