What should the requestid look like for API calls to ImageServer?

I’m trying to connect with the ImageServer API. I’ve established a socket connection and now I want to invoke `connect. In the docs, I see this example XML request body:

```

<?xml version="1.0" encoding="UTF-8"?>

1

connect

dummy

dummy

[guid]

id=[guid]&connectiontoken=[token]

```

Here as well as all subsequent examples that mention the element, does not explain its properties aside from that it needs to be a number. Should it be unique? Maximum number? Can it be negative?

The request id is only important if you have a multi-threaded integration or something similar where you might have multiple requests simultaneously.

Clarification: In the server side it is only copied to be included in the response. Anything will be usable as the requestid.