Forbidden characters in SQLtag paths and OPCtag paths


I’ve just found that ‘+’ is forbidden in Tag paths. (I use an XML file to define them)
-Is there a list of the forbidden characters ?
-Is there a way to define path with a ‘+’ by using a kind of pretection like \+

Thanks in advance !

Here is a link to characters that are invalid in tag names. There is no way to ‘escape’ special characters in tag paths.

To expand a little more - the first character in a tag/folder name must be a valid ‘letter’ (supporting Unicode’s definition of a letter), number, or an underscore. After that, most special characters are disallowed - but (,),',-,_,: are specifically allowed.