License: AGPL v3

• 2 backends: native implementation and sqlalchemy-core (has many backends, connectionpool, reflection etc)
• advantage over sqlalchemy-core:
  • one can convert command-objects into each other, useful for generating and validating webforms
  • syntax is closer to sql, e.g. select().from_(Model).where((Model.x == 2) & (Model.y ==3))
  • minimalist approach with broader focus than ORM (e.g. somecolumn.op('&')(0xff) would not work with native backend)
• advantage over pure object databases:
  • querying more convenient due to SQL-like syntax
• use alembic for alter table statements (based on sqlalchemy, http://alembic.readthedocs.org)
• take further inspiration from RDFAlchemy (SparQL)
• integrate searchengine, e.g. SphinxQL