Value Sets might contain incorrectly constructed ECL queries, which are identified and flagged on the Content tab of the resource.
Syntax errors are marked with a dynamic post-it style tag in the definition list.
The presence of an ECL syntax error also disables the Members section until a fix is in place.
To display information about the syntax error itself, leave your cursor over the tag and wait for the tooltip to appear.
Clicking on the tag invokes the Advanced Clause Editor, where the error can be fixed.
Hovering over the color indication at the end of the clause row reveals the post-it style tag: .
The tag is only clickable in editing mode.
