> ## Documentation Index
> Fetch the complete documentation index at: https://api.globalwebindex.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Combining Data from Different Namespaces

It is not possible to combine questions from any namespace with questions from any namespace in a single calculation query.

It is allowed to combine only questions from a recontact namespace with questions from its `parent_namespace_code`. This compatibility is for indefinite recontact parent relationship, i.e. recontact can be combined with its `parent_namespace_code` and with the `parent_namespace_code` of the `parent_namespace_code`, etc.

For example, assume the below namespaces:

```text theme={null}
"code": "core", "type": "fresh", "parent_namespace_code":null
"code": "gwi-r1", "type": "recontact", "parent_namespace_code": "core"
"code": "gwi-r2", "type": "recontact", "parent_namespace_code": "gwi-r1"
"code": "gwi-r3", "type": "recontact", "parent_namespace_code": "gwi-r2"
"code": "gwi-r10", "type": "recontact", "parent_namespace_code": "core"
```

In the above example questions from namespaces `core`, `gwi-r1`, `gwi-r2` and `gwi-r3` can be freely combined in a single calculation query because there is a parent child relationship among all of them.

It is also possible to combine in a single calculation query questions from namespaces core and `gwi-r10` because there is a parent child relationship between them.

However, it is not allowed to combine in a single calculation query questions from `gwi-r10` with questions from namespaces `gwi-r1` or `gwi-r2` or `gwi-r3` because there is not a parent child relationship between the `gwi-r10` namespace and the other namespaces.