Schema gives an objet the attribute macro from Virtus. but, it disables the virtus mass assignment constructor of the activerecord ilk
DataStructure adds a build method that can take a hash, and it does mass assignment
both Schema and DataStructure allow to_h to be called on the object
the hash returned from to_h contains only the declared attributes and their values
warning, don’t override the initialize method of either a Schema or DataStructure object
note: DataStructure inherits Schema
The schema library is released under the MIT License.