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I'm currently writing a paper for my study on the applicability of Spring Batch (a java framework) for the use cases of the department I'm currently in.
For this, I'm citing parts of the Spring documentation, and I wanted to use a
. in the bibliography entry identifier. While this at first had me worried that dots might not be permitted in identifiers, it turns out they are.
However, I can't help but wonder which characters are permitted - is it ASCII characters? A subset of ASCII characters (i.e. alphanumeric,
_)? All unicode characters? Some unicode characters?
Also, even if they are valid, are there characters that could create strange errors depending on which context the bibliography entry is referenced in?
No worries, I don't intend to use emojis in my identifiers, I'm just curious as to which characters are valid. Thanks in advance! :)