This is actually kind of akin to BeFS. Although BeFS had greater capabilities in some ways, being an actual filesystem. For the uninitiated, BeFS was the native

This is actually kind of akin to BeFS. Although BeFS had greater capabilities in some ways, being an actual filesystem. For the uninitiated, BeFS was the native filesystem of BeOS, and allowed for metadata attributes that allowed for querying and indexing capabilities akin to an relational DB. Or at least, that's what Wikipedia says.