...
2Committing SS from SP is supported for Floating weight and Blended benchmark only.
The Target entity will be built and supported only for the same type of input underlying source entities. For example, If Source 1 has S and Source 2 has SS the build will fail.
For CIDX types with single source entity like Currency Conversion (Exclusion and constrained – to be made available in future version), have the option of which security type returns to be picked for source and target. Here S source can create S. SS can create SS and SP can create SP.
The values of the new security types used and built is stored in the Custom Index Attributes table under the user data column. A possible issue with a custom blend is when one source benchmark contains security level data, and another source benchmark does not. In this case, the build creates a custom benchmark with the securities from only one source benchmark, which can be misleading.