Character restrictions in enumeration values

I’m wondering about character restrictions in enumeration values. In the Document Model Editor documentation, it is said that blanks are not allowed in enumeration values. In the SME I can enter blanks though without complaint, and they appear to be working just fine in an application.

Are there any issues to be expected when using blanks in enumeration values? I faintly remember that I encountered an issue a while ago that was related to that, maybe someone from BPS can remember details?

I guess either the Document Model Editor or its documentation need to be adapted.

We currently don’t have a validation in the SME.
@gildardo-cached-canyon should it be forbidden?

Talking about space " ", we only have the restriction that leading and trailing blanks are not allowed. Values like “space in between” are allowed.
Line breaks, tabs and such blanks are in general not allowed.

Thank you very much for your answer! Maybe it should be stated more clearly in the DMM documentation then.