New ProvenanceDM working draft released, part I

[Kristin Riebe]

Hi Tim, DM,

> As another data point, LSST will have the ability to attach a WCS to
> a raw image that is derived by looking at 1000 processed images. We
> will be tracking the provenance of that WCS and its inputs and have
> to attach it to the raw data as provenance. If someone asks for “all
> the inputs” they are not really going to want all 1000 processed
> images. They need those to exactly reproduce the processed image they
> will generate from that updated raw image but it’s clearly distinct
> in the provenance tree.
> 
> To be more concrete, if you now coadd two images that came from raw
> data that had WCS derived from 1000 other images, when someone says
> “what went into that coadd” they probably mean the two parent images
> and possibly the two raw data files.
That's interesting!
If one tries to model it in a clean way, then I think one should model 
an activity "add WCS" for each raw image, which takes the raw image, 
1000 other images and produces a new raw image with the WCS information 
attached.
Since I like it visually, I've created an image for this using draw.io, see

https://www.draw.io/?title=lsst-coadd.html#Uhttps%3A%2F%2Fraw.githubusercontent.com%2Fkristinriebe%2Fprovenance-images%2Fmaster%2Flsst-coadd.html

(It's also attached it as png.)
Would you also model it this way? With or without the brown 
wasDerivedFrom relations?

Cheers,
Kristin


-- 
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Dr. Kristin Riebe
Press and Public Outreach

Email: kriebe at aip.de, webmaster at aip.de
Phone: +49 331 7499-377
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