On 04/22/14 03:57, Mark Wielaard wrote:

Assuming the consumer is interested in "the object is not available for
the portion of the range that is not covered" property of the location
list then it looks like if the producer uses a default location list
entry that information is no longer available. Because a default
location list entry describes both the duplicate valid ranges and the
invalid ranges at the same time.
>
So if a producer wants to take advantage of a default location list
entry to encode a smaller location list for an object, then how should
it present to the consumer the same "not available" information?

I think that this is an unusual situation.  Can you describe when this
might be the case?

The most reasonable thing to do is not generate a default location.
If there is no default location which applies at all addresses which
are not specified in the location list, then generating a default
location doesn't make much sense.

An alternate might be to include a location list entry for the range
where the object is not available and have that contain a zero-length
location list.  That would be non-standard, but I think that any
consumer would reasonable interpret this as location not available.

--
Michael Eager    ea...@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306  650-325-8077
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