Foundation is in general a dependency-free base layer for Java projects. Foundation has four layers: pure, shared, jvm and client. ⚪️Pure: No dependencies, only classes from the j2cl compatible fragment. Java 11+ (maybe up to 21) syntax. Exception: Jjspecify annotations are allowed. ⚪️Shared: Only j2cl-dependencies allowed (e.g. elements). Java 11+ (maybe up to 21) syntax. ⚪️Client: This code runs only j2cl-compiled in the client. It may have dependencies to j2cl DOM libraries. Java 11+ (maybe up to 21) syntax. Graphinout does not need 'client' code. ⚪️JVM: This code cannot j2cl-compile. Any java syntax.

Reader for simple textual formats, such as NetworkX AdjList, edge list

Reader and Writer for PG-JSON format (Property Graph Format)

Reader for RDF (Resource Description Framework)