What characters are not allowed in Reuters symbol names

We need to know what characters are invalid for Reuters symbol names so we can use one of them to map '/' which we use as a separator but can be a valid character in Reuters symbol names. From the rather old User Guide I have here it looks like ' ' is a candidate but I'd like to get the official line on this.

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umer.nalla

Hi @andy.sciascia

You can find further details on RIC code components in the Elektron Edge Programmers Guide

This states that 'there can be no imbedded spaces within a RIC'

I also found another (internal) doc which states:

Illegal Characters

The following are not considered legitimate characters
anywhere within RICs.

‘(‘,
‘)’, ‘;’, ‘@’,
‘~’, ‘&’
Underscore, Space, Single & double quotes
Any non-printing characters (excepting brokerage
characters).
Characters above 7F

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Zhenya Kovalyov

What about @?

andy.sciascia

Thanks but what I really need is an official list of the allowed characters so we can pick one of the un-allowed ones. We did this a few years ago and settled on ' ' but I'd like to check that we're still ok using that.