Despite loss of Power, OBIX meeting

["Considine, Toby" <Toby.Considine@unc.edu>]

Craig would more or less like to accept the comment on tags

https://lists.oasis-open.org/archives/obix-comment/201412/msg00001.html

 

Wishes discussion before he re-writes.

 

 

---

5.5.3 Encodings
Typo in para 1, should "This is a list of  strs. The val of each str"

 

9.4 Metadata

This is a better design than the last version.  But it still seems unsatisfactory when it comes to how it will be applied to Haystack tags.  In Haystack the vast majority of tags are marker tags which the proposed oBIX spec requires those tags to be sub-objects.  But in reality marker tags are much closer to oBIX contracts.  I think it would be cleaner to define marker tags in the "is" attribute using their tagspace as their prefix.  Consider:

 

  // proposed version

  <obj displayName="Discharge Temp Sensor">

     <obj ts="h" name="discharge"/>

     <obj ts="h" name="temp"/>

     <obj ts="h" name="air"/>

     <obj ts="h" name="sensor"/>

     <obj ts="h" name="point"/>

  </obj>

 

  // versus simpler design

  <obj displayName="Discharge Temp Sensor"

   is="h:discharge h:temp h:air h:sensor h:point">   

  </obj>

 

14.1 History Object - HistoryCollection

The terms "collection" and "HistoryCollection" seem sort of generic and confusing.  How about "collectMode" and "HistoryCollectMode" 

 

14.1 History Object - prototype

Glad to finally see something like this.  However I am not quite sure how it works.  I think we need an example.

 

14.2.4.2 History Query as Preformatted List

This design requires two separate round trip requests which is pretty terrible for performance.  I think a requirement of this design is that once the history point is learned by the client system, that it can request history data with a single HTTP request.  I don't see that having an oBIX XML response before getting the data provides much value.  I would suggest this: just add a "format" field to the HistoryFilter object and when specified the result is returned in the requested MIME type.

 

 

---

"Computers are useless. They can only give you answers."

—Pablo Picasso

---

Toby Considine Phone: (919)962-9073 Information Technology Services University of North Carolina Chapel Hill, NC

Email: Toby.Considine@unc.edu Chair, OASIS OBIX Technical Committee Chair, OASIS WS-Calendar Technical Committee Editor, OASIS EMIX, Energy Interoperation TC