Via autogenerated editors users can make schema-valid ckan files and someday when there is a netkan-schema, netkan files, too.
These editors do not seem to provide a user-friendly workflow - this webtool should stay better.
One example for a generated form is at https://gist.github.com/janbrohl/0c9aa1c8d026b7b5e4e4cd3c869e42f5