Join multiple knowledgegraphs

[joergfunger]

In the minimum working example, we generate a separate KG for each test. This mimics the situation of another test being performed which is supposed to be added to the large (single) KG. Before adding, a shacl validation is performed. Currently, this building of a joint knowledge graph is not done. Apart from building this global KG, the querries should also be reformulated (because they do not work for multiple data sets) and require e.g. to get the diameter, length, .. of a specimen for all tensile tests performed.

[PoNeYvIf]

I will start working on that this week. However I was wondering what a shacl validation is performed. Is there a tool that I can use for that? Is there a documentation about this tool? Also before merging all the KGs together I think that it would be great to find a nomenclature about the classes that will represent our specimens. For instance the entity that is linked to our diameter is automatically name informationbearingentity1 by owlready2. The naming can be different but I don't know what we should choose. I could imagine that something like specimenNameDiameter would be better. Is there a preferred way to name those?

[joergfunger]

The shacl valdidation is already implemented by @horstf and there is a merge request #18 . So in theory that is just a prcoedure to validate the single dataset before joining, though if it passes the test (and only in that case it should be added to the graph) there is no change in the ttl of the single test. That said, in a first step you don't have to worry about the shacl validation, that could be added afterwards and maybe even @horstf could help doing that.