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Hi, Stepan.

This is an excellent start.

My main concern in looking at this is that some of this information may not even be available in the current EVIO files.  

There are basically four types of data here.

1) Easily available event and recon data (hits, etc.)
2) Embedded data/bits from EVIO trigger banks, etc. (probably accessible but needs extraction)
3) Externally accessible information such as beam conditions which are not in the EVIO files but could (?) be put into the data stream somehow (possibly with difficulty and tediousness)
4) Possibly unavailable conditions that were never recorded (not sure of which exactly)

I'm not sure this is 100% clear, but I just wanted to make the point that some of this data you've put here is much more easily accessed than other parts.  We might want to start with the recon and analysis objects only, as the other data may require some significant work to access and put into the DSTs.

--Jeremy

On Aug 16, 2012, at 5:26 PM, Stepan Stepanyan wrote:

> Hello Pelle,
> 
> There was no proposal or decision on who will make DSTs.
> We discussed this format for ROOT trees.
> I assume production of DSTs will become part of the off-line
> reconstruction, eventually.
> Are volunteering to take care the production of DSTs.
> 
> Regards, Stepan
> 
> On 8/16/12 6:04 PM, Hansson Adrian, Per Ola wrote:
>> Hi Stepan,
>> 
>> that looks about right. A couple of iterations is usually not a problem if something is missing.
>> 
>> I missed the discussion today. Was there a decision on who would maintain the production of these and what format it would be (assuming ROOT trees)?
>> 
>> Cheers,
>> 	Pelle
>> 
>> 
>> On Aug 16, 2012, at 2:34 PM, Stepan Stepanyan wrote:
>> 
>>> Hello everyone,
>>> 
>>> As we discussed at today's meeting, I am sending in the attachment
>>> my proposal for a format of the HPS DST. Comments and suggestions
>>> are welcome.
>>> 
>>> Stepan
>>> 
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