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1 \subsection{Minimum requirements for provenance}\label{sec:requirements}
2
3 We derived from our goals and use cases the following minimum requirements for the Provenance Data Model:
4
5 \begin{itemize}
6
7 % == other models / serialisation
8
9 \item Provenance information must be stored in a standard model, with standard serialization formats.
10
11 \item Provenance information must be machine readable.
12
13 \item Provenance data model classes and attributes should be linked to other IVOA concepts when relevant (DatasetDM, ObsCoreDM, SimDM, VOTable, UCDs, \ldots).
14
15 \item Provenance information should be serializable into the W3C provenance standard formats (PROV-N, PROV-XML, PROV-JSON) with minimum information loss.
16
17
18 % == links between entity/activity
19
20 \item Provenance metadata must contain information to find immediate progenitor(s) (if existing) for a given entity, i.e. a dataset.
21 %All produced entities must contain information to find its immediate progenitor(s).
22
23
24 \item An entity must point to the activity that generated it (if the activity is recorded).
25 %Provenance metadata must contain information to find the activity that generated a given entity.
26 %* All produced entities must contain information to find the activity that generated it
27
28 \item Activities must point to input entities (if applicable).
29
30 \item Activities may point to output entities.
31
32 \item Provenance information should make it possible to derive the chronological sequence of activities.
33 %The order of the activities should be available.
34
35 %\item Provenance information should contain the list of activities and progenitor entities.
36 % too vague .... must be an ordered list ... One step should also be allowed.
37 \end{itemize}
38
39 % ==== Comment:
40 %These links can be used to trace back the sequence of processing steps (activities) and possibly the interim results.
41
42
43 % == additional information
44
45 \begin{itemize}
46
47 % Released entities must have a unique, persistent identifier (DOI, obs_publisher_did, ...), at least in their domain.
48 \item Provenance information can only be given for uniquely identifiable entities, at least inside their domain.
49 % comment: (DOI, obs_publisher_did, ...)
50 % Thus entities have to have a unique, persistent identifier.
51 % (to avoid ambiguities).
52
53 \item Released entities should have a main contact.
54
55 \item It is recommended that all activities and entities have contact information and contain a (short) description or link to a description.
56 % could also be the documentation.
57
58 \end{itemize}
59
60
61 % Should this go into the requirements or the model?
62 %\item Activities should be defined by following keywords (attributes):
63 % \begin{itemize}
64 % \item unique ID
65 % \item status (COMPLETED/ERROR/...)
66 %
67 %... (see working draft and data model)
68 %* Entities should be defined by... (see working draft and data model)
69

msdemlei@ari.uni-heidelberg.de
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