@artem_vysotsky - We're unfortunately finding that some (perhaps many?) targets do not support variant (property-less) object nodes in the catalog schema - for instance, target-bigquery does not. We wanted to address either Support variant `object` types in tap SCHEMA (#192) or Performance issues when importing large json objects (#161) but it looks like the latter is a better investment - at least until more targets can handle this type of schema declaration. What do you think?