TypeOf only gives the type of identifiers, not of expressions.

[darbyhaller]

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For example, (Query (TypeOf "S")) returns the correct result, however (Query (TypeOf "S O")) results in the error (CErrors.UserError ("" "Invalid character ' ' in identifier \"S O\".")))

[ejgallego]

Indeed TypeOf only admits identifiers at the moment; hopefully will take care of that in the new query language.

[ejgallego]

You could give it a go, however there is the issue of choice of input representation that we still didn't handle at all.