Rob Marrowstone

An observation is that the `TimestampBuilder` could be refactored to take the components of the `Decimal` for fractional seconds. This would preserve the invariants such that the Text parser and...

It's not clear to me that the right answer is to disallow "offset-aware" dates. The W3C XSD date type allows an offset, for example, and the Java SE DateTimeFormatter parses...

Another example: `(2000T -2001T)` Is not valid per the ANTLR grammar (Ion doesn't allow negative timestamps), but it _could_ be parsed as: `(2000T '-' 2001T)`

To make a question explicit: the Spec says "real values" as to whether the intention was "real numbers" (in the mathematical sense) or "real values" (as in not-null?) is not...

Has an option flag been considered? For example: ``` ion --beta schema validate ... ``` Where the `--beta` (or `--experimental`?) flag would enable beta functionality but does not prevent production...