ProvDayApr2018 < IVOA

---+ Provenance Hack-a-thon Session @ in Asterics Tech Forum, 2018/04/17 *Summary*

*Participants* : Mireille Louys, Michele sanguillon, Ole Streicher , Markus Nullmeier, Markus Demleitner, François Bonnarel

*Markus D.*: how can we realize the simple thing : time series ---&gt; progenitor

Answer:

   * Need some description of an Activity : Extraction of a mag from an image etc ..
   * Follow the Prov relations : _wasDerivedFrom_ or _wasGeneratedby + Activity ID+ Used_
Carlos's use-case: Provenance from points in a SED or light curve

Linking points in a data set to other data products : extracted image, extracted spectrum, etc. Is it simple to solve?

   * without the prov DM:
datalink + progenitor link if it exists datalink + preview if we want to illustrate only the point via an image

   * with provenance info :
select the wasDerived relation in Prov : it will provide you with a progenitor if present.

*François* : linking the prov info from Obscore :

this can be designed with a "prov" column which contains a link to a Prov document in one PROV format (PROV-N, or PROV-JSON)

*IVOA PROV Data model design* :

A suggestion to handle ActivityDescription by Ole

The PROV-N document is at [[https://provenance.ecs.soton.ac.uk/store/documents/118181/]]

[[http://wiki.ivoa.net/internal/IVOA/ProvDayApr2018/prov-templates.png][The attached Figure contains: ]]
<div style="color: #000000; font-size: small;" id="_mcePaste">* Top graph: representation of an activity executed on real data</div> <div style="color: #000000; font-size: small;" id="_mcePaste">* Below graph : Define a template for a an ActivityDescription here "musesci_post" with known roles, with context dependent names, for instance here in the muse:namespace</div> <div style="color: #000000; font-size: small;" id="_mcePaste">a Bundle class (W3C compatible) for expressing ActivityDescription</div> <div style="color: #000000; font-size: small;" id="_mcePaste">- solves the pb of roles</div> <div style="color: #000000; font-size: small;" id="_mcePaste">A realisation of an Activity:</div> <div style="color: #000000; font-size: small;" id="_mcePaste">* uses the activity template</div> <div style="color: #000000; font-size: small;" id="_mcePaste">* uses entities with used roles and generated roles defined in the bundle for description</div> <div style="color: #000000; font-size: small;" id="_mcePaste">Musesci_postT1A : Activity Instance</div> <div style="color: #000000; font-size: small;" id="_mcePaste">has relation "Used" with role "voprov:description" with instance Musesci_post:Bundle</div> <div style="color: #000000; font-size: small;" id="_mcePaste">All other "used" relation should instantiate a role defined in the related Bundle with domain specific namespace, here "muse:"</div> <div style="color: #000000; font-size: small;" id="_mcePaste">Bundle is a W3C class derived from an Entity.</div> <div style="color: #000000; font-size: small;" id="_mcePaste">This should be also possible in a VOTable serialisation</div> <div style="color: #000000; font-size: small;" id="_mcePaste">** Comment François ** :* </div>

<div style="color: #000000; font-size: small;" id="_mcePaste"> *check that this can be coded into the VOTABLE serialsition as well.* </div>

<div style="color: #000000; font-size: small;" id="_mcePaste"> *** Suggestion Michèle ** :* </div>

<div style="color: #000000; font-size: small;" id="_mcePaste"> *apply this template solution to a Pollux activity example, using 2 chained activity templates.* </div>

<div style="color: #000000; font-size: small;" id="_mcePaste"> *** Comment Mireille**:</div> <div style="color: #000000; font-size: small;" id="_mcePaste">+ by this construction we can gather in just one construct the description part of an Activity , together with the roles ( formally defined as attributes of UsedDescription)</div> <div style="color: #000000; font-size: small;" id="_mcePaste">+ the roles at execution can be validated agains the activity template .</div>

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Attachments
Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
png	prov-templates.png	r1	manage	115.1 K	2018-04-19 - 21:46	MireilleLouys	Ole's Activity template together with an instance of an Activity of this type
This topic: IVOA > WebHome > IvoaDataModel > ObservationProvenanceDataModel > ProvDayApr2018
Topic revision: r2 - 2018-04-19 - MireilleLouys