Today in Easymorph you can provide a URL on a connector to get help for example and this URL appears in annotation part in actions.
I think we all need a kind of metadata dictionnary. This is a major need that is not implemented by common ETL tools. For example in Easymorph, users can see tables and views, fields inside but sometimes they would need explanations to know more about what they query.
First simple evolution that can be done fast : display connector URL in the query editor.
Second evolution more complex but why not : use the comment feature of databases. For example in oracle, you can comment tables and views fields. So why not display those comments in query editor ? Like tooltip or new information in the left pane, or by right click on it. For comments on tables, you could display them in the window of table selection. Or you provide links on “table” and each field, so that when you click on it, comments appear.
There would be another possibility to provide a kind of dictionnary that would be matched to tables and columns but maybe harder to deal with.