Switch back to single delimiter (remove RdfPrefixedName)

[mchlrch]

The customizations for the RdfPrefixedName from #12 (the : delimiter) don't work in a theia deployment (#67).

To simplify things and allow us to move forward with experimentation with theia, we need to switch back to the default behavior of only having one single delimiter, the .

[nnamtug]

After discussing with @mchlrch :

Different delimiters for QualifiedNames do block the progress in Theia - so go back to only using '.' as delimiter. But since we do not know which other features will be supported in Theia, let's postpone the decision to reduce featureset of all editors into the common subset of capabilities of Xtext@Eclipse and Theia.

Thinking of the vision how this tooling could evolve, we expect to add new type of fan-in channels for the mapping models. For now, Theia could be one (preferably same fan-in type, but pushing online editor could lead to the decision to have a different flavors of the editor), but definately #72 is a new fan in. This increases the fan-in complexity and implies to use a syntax free domain model:

Having a domain model in place gives us the flexibility back to decide, how the concrete syntax in the editors should look like. This is the point where we might want to revisit the decision about e.g. the separator in the QualifiedNames.

For now:

• Keep implementation but make its functionality neutral by replacing '.' with '.' (instead of ':') for now
  • Removes blocking condition for Theia
  • Easy to do, preserving functionality of replacement
• Migration of existing DSL-files is still required
  • No version of the editor using ':' as delimiter has been released (besides early adopters)

For details concerning domainmodel, see page 12: Meta-Architektur: Das richtige Setup für Ihr MDD-Projekt

[mchlrch]

I tested in Eclipse as well as in VScode/theia - it works on both runtime platforms. Closing this