In looking for existing tables, be able to include arbitrary characters (including _ ) in the prefix string

[tedrick]

_ in prefix string breaks table parsing. See https://geonet.esri.com/groups/survey123/blog/2016/12/14/migrating-data-from-the-survey-feature-service-to-an-enterprise-geodatabase?commentID=45053&et=blogs.comment.created#comment-45053