JSOI is your model interchange solution if you want the ability to retrieve subsets of elements by type, lazy evaluation of references or get element demographics without element loading.
How to speed up the access and queries on large models thanks to our language (and execution environment) to define prefetching/caching plans for specific modeling scenarios
LSP (Language Server Protocol) facilitates the development of IDEs but so far only language server for textual languages are supported. Read our proposal to adapt LSP for graphical lenguages