Changes between Initial Version and Version 1 of WhyExtraData


Ignore:
Timestamp:
02/17/06 08:50:57 (13 years ago)
Author:
joe
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • WhyExtraData

    v1 v1  
     1= Why do I get records I wasn't expecting when I search? = 
     2 
     3One of the principles of the VSO is that it's better to return too much data, rather than return too little data. 
     4 
     5Although there are measures to ensure that data providers aren't contacted when they are known to not have any data, there may be times when the data provider's catalog doesn't differentiate between some of the facets of the VSO data model.  In those cases, the VSO policy is to return all data products that ''might'' match. 
     6 
     7For instance, if a data provider knows that it has two types of physical observables in its repository, but can't easily differentiate between them, it might serve both types for all requests.  (VSO, however, will only contact them when requesting those two physical observables) 
     8 
     9Likewise, for range matching, we use the most broad definition of match -- a non-vanishing intersection.  As such, a data produc's time range or spectral range may not be fully within the time you gave. 
     10 
     11------ 
     12 
     13If you believe that a data provider is clearly in error (eg, non-intersecting ranges), or would like to suggest particular cases for improvement, the easiest way to show us us the query and subsequent problem records is to do the following: 
     14 
     15 1. Run the query in question 
     16 1. Select the data products that you believe are in error 
     17 1. Select 'Add to Shopping Cart' 
     18 1. Copy the 'Cart ID' that is assigned to your cart. 
     19 1. [wiki:ContactUs Contact us] and let us know the nature of the complaint and the Cart ID. 
     20 
     21----- 
     22 
     23[wiki:VsoFAQ Back to the VSO FAQ]