11g compatible mappings maintain compatibility to the 11g SDK, so that existing programs using the ODI SDK continue working in 12c.
11g-compatible mappings can only be created in the following ways:
Upgrade from an 11g work repository, and in the Upgrade Assistant, de-select Don't Maintain ODI 11g SDK Compatibility.
Through commands of the 11g-compatible SDK.
11g-compatible mappings are presented under the mapping node in the Designer Navigator. 11g-compatible mappings cannot be created or modified in ODI Studio; a mapping opened in the mapping editor is read-only. These mappings are distinguished from 12c mappings by an 11g interface icon.
"Using Compatibility Mode" in Oracle Fusion Middleware Developing Integration Projects with Oracle Data Integrator