Using Imported Grammar Rules

[msujew]

Discussed in https://github.com/langium/langium/discussions/532

^{Originally posted by **ballcoach12** June 8, 2022} I have a grammar that imports rules from another grammar. My entry rule looks like this: ``` entry TemplateLibraryModel: (library=TemplateLibrary | ( globalBehaviors+=BehaviorDef* ) ) ; ``` The imported grammar appears to be valid, but the other grammar is showing errors in the Langium editor:  But, as you can see, the grammar is imported, and the `BehaviorDef` rule does exist and is valid:  I am unsure about what is causing this error. I used the editor's Quick Fix to insert the import statement, so I think the file is accessible. Is this a bug, or am I going about this import the wrong way? ** I will also note that the error in the editor goes away if I use `BehaviorDef` as a cross-reference instead of a grammar rule in the `Xeta` grammar file. *** For reference, my overall goal here is to populate a global scope with `BehaviorDef` elements that are loaded from an external DSL file.

[msujew]

@ballcoach12 This isn't actually intended behavior, but a bug. For some reason the validation triggers even though the import exists. This only seems to happen if the import contains ... The import URI isn't normalized and creates a weird document URI. Since we check for document equality by comparing URIs, the check fails and the validation triggers. I'll look into this.

[spoenemann]

See also #526 about normalizing relative paths.

[msujew]

This has been resolved with https://github.com/langium/langium/pull/763.