> On Jan 27, 2016, at 9:29 AM, Malcolm Herring <malcolm.herr...@btinternet.com> 
> wrote:
> 
> On 27/01/2016 16:36, Frederik Ramm wrote:
>> One thing that I would like to see discussed is ordering.
> 
> There should be allowance for both ordered and unordered multiple values. 
> Whether this is left to the producer/consumer tools or indicated in the tag 
> template is debatable. In the former case the tag definition should be 
> documented to indicate the interpretation of multiple values. In the latter 
> case, a solution such as different delimiter characters would be needed - 
> maybe semicolon for unordered and commas for ordered?
> 
Or, following the example of turn lanes, use semicolon for unordered and 
vertical bar for ordered. It seems to me that a comma might be too common a 
character in real world values to have a special use. While an escape mechanism 
needs to be defined, it would be nice if it were seldom needed.

Assuming, of course, that a delimiter syntax in the value domain is used.

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