Today we continue reading the paper on DBPowder. We were reviewing related technologies Today we will continue some more discussion. Hibernate is mentioned as an  ORM that handles complex correspondence. Here developers describe mappings between the persistent classes and the relational schema in hbm files. This file is used to generate code and table. However, each time the hbm needs to be updwted, it is pretty disruptive. Even with annotations the expressibility of the mapping isn't improved. While we talk about ORM framework, we don't talk about the mark and sweep required for Graph API. Those we read in distributed computing. Here we read the paper for improvements to the mapping framework. Also we were hinting at writing Graph API for Active Directory objects CRUD. That cannot work unless AD objects CRUD works via LDAP protocol. We need proper credentials and reserved OU. And even so, will most likely require a ticketing framework for changes to be captured in audit trail.