SED data model v0.92

[Ed Shaya]

>Yes. 
>The Flux object has an accuracy, and there's one for each Point.
>This should be clear in the diagram and in the serialization examples,
>but it isn't clear in the text in section 4.7. Sorry about that.
>
>  
>
I also do not see it in the XML Schema.

>>Secondly, you have for upper limit information:
>>
>>"If the data provider has only upper limit information, it should be 
>>represented by setting the flux value and the lower error value equal to 
>>the limit. "
>>
>>But what about the postiiveError limit?  Is it then set to zero?
>>    
>>
>
>Yes, I'll add such text.
>This is one point I'd particularly encourage feedback on - is this
>an OK way to go for upper limits? I don't want to add an extra field
>that's usually not used.
>
>  
>
Hopefully, it is rare that one only has upper limit info.  The observers 
certainly should provide the measured value even if it is below the 
noise.  There is non-zero information in that value.

Ed