The visitorNamespace variable is used to identify the domain with which cookies are set.
|Max Size||Debugger Parameter||Reports Populated||Default Value|
Analytics uses a cookie to uniquely identify visitors to your site. If visitorNamespace is not used, the cookie is associated 2o7.net. If visitorNamespace is used, the cookie is associated with a sub-domain of 2o7.net. All visitors to your site should have their cookies associated with the same domain or sub-domain.
The reason for using the visitorNamespace variable is to avoid the possibility of overloading a browser's cookie limit. Internet Explorer imposes a limit of 20 cookies per domain. By using the visitorNamespace variable, other companies' Analytics cookies will not conflict with your visitors' cookies.
The value of visitorNamespace must be provided by Adobe and is a string of ASCII characters that don't contain commas, periods, spaces, or special characters.