I searched MicroStation help in vain for an answer to this question: What are the legal (and illegal) characters for the names of Models, Levels, Item Types, etc.?
For example, I can create a model name such as Hyphenated-Model-Name, but not ModelName?. That is, a hyphen is a legal character but question mark is an illegal character. What other characters are illegal in a name? Where are those documented?