[NeXus-code-tickets] [NeXusCode] #274: make external links to datasets work

[NeXus Data Format Library and Applications]

#274: make external links to datasets work
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 Reporter:  Tobias Richter  |       Owner:  Tobias Richter
     Type:  defect          |      Status:  new           
 Priority:  major           |   Milestone:                
Component:  napi            |     Version:  4.2.0         
 Keywords:                  |  
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 The current NAPI only supports links to groups. We suspect a main use case
 for linking to an external file is writing data into two files from an
 acquisition system and directly from a detector (for obvious performance
 reasons) but having them as a single logical unit for data analysis by the
 user. This use case has two main problems with linking to groups:
  * The detector needs to write the entire NXdetector group and hence has
 to know the entire metadata you might want there. With the level of
 control you have over detector file writing that is a major drawback.
  * It is not possible to link the detector data into an /entry/nxdata from
 /entry/instrument/detector/data as that needs to cross file boundaries
 (correct me if I'm wrong there).
 If it was possible to link to an SDS, these limitations would not exist.

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Ticket URL: <http://trac.nexusformat.org/code/ticket/274>
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