The ESCL is a class library that can be used to develop electronic structure codes like those that are used in computational condensed matter physics. An object-oriented approach is suitable since real-world items like atoms and electrons are modeled.
Java Component created to persist and work with trees (it doesn't matter the type of persistence). Based on "Nested Set Model of Hierarchies" by Joe Celko. [Componente Java para persistir y trabajar con árboles (no importa el tipo de persistencia)]