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Re: [ddlm-group] Revised version of syntax change summary document

Why is a colon disallowed in an unquoted string? it is not ambiguous, 
even in a table data type, because the index string is always quoted. 
There is nothing ambiguous about parsing

    "a:b":c:d

which gives the index name "a:b" and the value "c:d". In fact, the index 
name only needs quotes under the same rules as regular values, except 
when it includes a colon character.

If the intent is to make quoting restrictions uniform for all strings, 
then excluding : from unquoted strings makes sense, but ther is then no 
reason to mandate quotes for table index strings.

Maybe there is a good rationale, but it is not explained in the current 
(#2) draft.

Thanks,
Joe Krahn
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