Workflow descriptions

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Here we describe the different workflows in the model data explorer on a more technical basis.

Our relation model includes several permission levels and roles as decribed in Datasets and data groups and Data groups. In this section, we describe how the permissions are implemented and what happens if we change relations between users, datagroups and datasets.

We document this with so-called sequence diagrams. If you are not familiar with this concept of diagrams, please read the following short description.

Explanation on Sequence Diagrams

Sequence diagrams, as their name suggests, describe a sequence of actions between actors (such as a DataGroup Owner) and objects (such as a DataGroup).

Each actor and owner has a so-called lifeline. If action A is below action B on a lifeline, then A happens before B.

An action in that sense is visualized by an arrow. A solid arrow means that the object/actor requests something, a dashed arrow means that the object/actor returns something.

Furthermore we have so-called interaction fragments, denoted by a gray rectangle. Here we use the following fragments:


A loop fragment implies a loop on the arguments that are given in square brackets (e.g. [DataGroupNode])


A ref fragment (also called interaction use) points to a different sequence diagram (e.g. the Link DataGroups fragment refers to Sequence Diagram to link two DataGroups in the parent graph).


An alt fragment refers to alternative decisions, like an if-else-case. We usually use these to document something like if approved by DataGroup Owner, do something, else, revert.

If you want to know more about sequence diagrams, please have a look at